- stunnel-users - stunnel.org

OCSPflag not processed in ocsp_stapling() ?
by King's Way 01 Dec '25

01 Dec '25

Hi there, I was trying to make stunnel ignore OCSP verification error for local certificates when doing OCSP Stapling. But it seems the flag "OCSPflag = NOVERIFY" is not properly passed to openssl. I have tried to patch it in function ocsp_stapling(), and it worked. But I wonder whether it is a bug or intentionally designed this way? With kind regards！ ------------------------------------------------------------ King's Way <io[AT]stdio.io<http://stdio.io>>

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Getting Started - Unique Situation
by Kevin Morris 21 Nov '25

21 Nov '25

Hi All! About me: I've never heard of stunnel before but it sounds great. I'm not a networking/internet expert. Here is my situation: Platform: Microsoft Windows Server 2016. Two Network Interface Cards. Port 443 on both currently have HTTPS/TCP traffic on them, from two different Web Apps, each with their own domain. Everything is working properly, traffic is very low, only a few (about 20) hits per minute (each port) at max load. Both Web Apps are built using Lazarus, Free Pascal, Brook Framework. The Brook Framework has the built-in ability to handle SSL/TLS encryption. Certs are supplied by Let's Encrypt, and new certs are obtained by a bot. I now have a third and soon a forth Web App built using the same technology, but my only two 443 ports are occupied. Here is my requirement: I need something that will act as a "port splitter". Maybe this is also known as a reverse proxy. Example: Incoming URLs on port 443: https://mywebapp.companyname.com/bob/useraccount?act=login&exp=pg https://mywebapp.companyname.com/betty/useraccount?act=login&exp=pg The port splitter needs to recognize the part in teal green (maybe called an "entry point"?), and pass that unchanged traffic through to (and from) a port that the associated Web App is listening on. WebApp "bob" is listening on local port 449 (not exposed to the internet, only conversing with stunnel) WebApp "betty" is listening on local port 451 (not exposed to the internet, only conversing with stunnel) Both Web Apps will send/receive their own HTTPS traffic, handle their own decryption/encryption, and send it back through their respective listening ports, through the port splitter, back the the requesting user. No load balancing is required. No decryption/encryption/certs is/are required. This needs to happen downstream from our router, without making any changes to OS rules or router settings. I'd like to just shut down the current Web App listening on port 443, reconfig it to a new local port As I looked through the FAQ and manual, I could not determine if stunnel could do this. So my questions are: A) Can stunnel do this? B) If so, is there a "How To" I missed in the manual I can read to do this? C) If ((A = Yes) and B = No)), can you tell me in a couple sentences where to look in the config file to do some reading and get this set up? If we can get this working, there are other Lazarus/Brook developers who could benefit from using stunnel. If stunnel is not the answer, is there another "port splitter" piece of software that you know of that can? (other than IIS with ARR and WAP, I don't want to use those, I'm slowly trying to de-Microsoft my infrastructure.) Thanks in advance!

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+=item B<requireCert> = yes | no ignored when client = yes
by u34＠net9.cf 13 Nov '25

13 Nov '25

In my opinion, the following emphasis worth including: --- stunnel.pod.in.orig 2025-10-07 19:50:30.097392645 +0000 +++ stunnel.pod.in.new 2025-10-07 20:25:54.448391940 +0000 @@ -1065,6 +1065,8 @@ =item B<requireCert> = yes | no +Ignored when client = yes. + require a client certificate for I<verifyChain> or I<verifyPeer> With I<requireCert> set to I<no>, the B<stunnel> server accepts client

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stunnel 5.76 core dumped
by Bogdan Siara 02 Nov '25

02 Nov '25

Hi, I try to run stunnel with certs from hardware token and I get error: root@c6b200207f1a:/stunnel-5.76# stunnel free(): invalid pointer Aborted (core dumped) This is my configuration: engine = pkcs11 engineCtrl = MODULE_PATH:/usr/lib/libeToken.so engineCtrl = PIN:pin output = /var/log/stunnel.log debug=debug [in-hdt] client=no accept = 172.18.1.2:443 connect=127.0.0.1:8080 cert = /etc/stunnel/certs/hdt.pem key = /etc/stunnel/certs/hdt.key sessionResume = no options = NO_TICKET retry=yes TIMEOUTclose = 0 debug=debug [in-vpc] client=no accept = 172.18.2.2:443 connect=127.0.0.1:8081 cert = /etc/stunnel/certs/vpc.pem key = /etc/stunnel/certs/vpc.key sessionResume = no options = NO_TICKET retry=yes TIMEOUTclose = 0 debug=debug [in-iam] client=no accept = 172.18.3.2:443 connect=127.0.0.1:8082 cert = /etc/stunnel/certs/iam.pem key = /etc/stunnel/certs/iam.key sessionResume = no options = NO_TICKET retry=yes TIMEOUTclose = 0 debug=debug [out-hdt] client=yes accept=8080 connect=ip1:443 engineId=pkcs11 sni = hdt cert=pkcs11:model=ID%20Prime%20MD;manufacturer=Gemalto;serial=...;token=eToken;id=...;object=...;type=cert key=pkcs11:model=ID%20Prime%20MD;manufacturer=Gemalto;serial=...;token=eToken;id=...;object=...;type=private;pin-value=pin sessionResume = no options = NO_TICKET retry=yes TIMEOUTclose = 0 debug=debug [out-vpc] client=yes accept=8081 connect=ip2:443 engineId=pkcs11 sni = vpc cert=pkcs11:model=ID%20Prime%20MD;manufacturer=Gemalto;serial=...;token=eToken;id=...;object=...;type=cert key=pkcs11:model=ID%20Prime%20MD;manufacturer=Gemalto;serial=...;token=eToken;id=...;object=...;type=private;pin-value=pin sessionResume = no options = NO_TICKET retry=yes TIMEOUTclose = 0 debug=debug [out-iam] client=yes accept=8082 connect=ip3:443 engineId=pkcs11 sni = iam cert=pkcs11:model=ID%20Prime%20MD;manufacturer=Gemalto;serial=...;token=eToken;id=...;object=...;type=cert key=pkcs11:model=ID%20Prime%20MD;manufacturer=Gemalto;serial=...;token=eToken;id=...;object=...;type=private;pin-value=pin sessionResume = no options = NO_TICKET retry=yes TIMEOUTclose = 0 debug=debug When I try run in gdb: root@c6b200207f1a:/stunnel-5.76# gdb stunnel GNU gdb (Ubuntu 12.1-0ubuntu1~22.04.2) 12.1 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html > This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from stunnel... (gdb) r Starting program: /usr/local/bin/stunnel [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff789f640 (LWP 4875)] [Thread 0x7ffff789f640 (LWP 4875) exited] [New Thread 0x7ffff789f640 (LWP 4876)] [New Thread 0x7ffff6c78640 (LWP 4878)] free(): invalid pointer Thread 1 "stunnel" received signal SIGABRT, Aborted. __pthread_kill_implementation (no_tid=0, signo=6, threadid=140737346406208) at ./nptl/pthread_kill.c:44 44 ./nptl/pthread_kill.c: No such file or directory. (gdb) stunnel is running in docker container ubuntu:22.04 Can someone tell where is the problem? Regards BS

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Was LOG3[per-minute]: OCSP: SSL_get_certificate for a shared secret, PSK, configuration fixed with 5.76?
by u34＠net9.cf 01 Nov '25

01 Nov '25

Hello, At [stunnel 5.76 released](https://www.stunnel.org/mailman3/hyperkitty/list/stunnel-users@st… - Missing OCSP stapling is no longer logged as an error. was mentioned in Bugfixes. My understanding is [LOG3[per-minute]: OCSP: SSL_get_certificate](https://www.stunnel.org/mailman3/hyperkitty/list/stunn… is fixed. But it isn't.

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Should remote host IPs recorded at lower debug levels too?
by u34＠net9.cf 21 Oct '25

21 Oct '25

Does recording the IPs of the remote host depends on other configuration directives, other then the debug directive? Is it correct that at LOG5, IPs of the remote host are recorded at the log file? Is it correct that at LOG3, no IPs are recorded even when other information for a particular connection is considered worth recording? Aren't IPs considered important information worth recording when error conditions are recorded?

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stunnel 5.76 released
by Michał Trojnara 18 Oct '25

18 Oct '25

Dear Users, I have released version 5.76 of stunnel. ### Version 5.76, 2025.10.18, urgency: MEDIUM * Security bugfixes - OpenSSL DLLs updated to version 3.5.4. - Service-level multivalued options now override (rather than append to) global defaults, preventing unintended configurations. * Bugfixes - Fixed enabling/disabling of the default fips=yes property. - Missing OCSP stapling is no longer logged as an error. - Fixed a crash when a PIN was required due to the PKCS#11 CKA_ALWAYS_AUTHENTICATE attribute. * Features - Quantum-resistant hybrid key agreement X25519+ML-KEM-768 (X25519MLKEM768) used by default with OpenSSL 3.5+ and TLS 1.3. - Multiple cert sources are supported, allowing a certificate to be fetched from a provider while loading the chain from a file. - Android build switched to a 16 KB page size. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: cda37eb4d0fb1e129718ed27ad77b5735e899394ce040bb2be28bbb937fd79e1 stunnel-5.76.tar.gz d93c7c01366d38ebd27689d606e45197ba8e2e2a32d1a186a81d2b01186bfb56 stunnel-5.76-win64-installer.exe f081281c92f6dc245e23d57930f3963d0155a9fc4a707b7414c941e8e60a1957 stunnel-5.76-android.zip Best regards, Mike

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LOG3[per-minute]: OCSP: SSL_get_certificate
by u34＠net9.cf 15 Oct '25

15 Oct '25

With stunnel version 5.74 and debug = 3 foreground = yes setgid = abcde setuid = abcde output = /path/to/log/file [service] PSKsecrets = /path/to/secretfile accept = ip1:port1 connect = ip2:port1 debug = 3 setgid = abcde setuid = abcde This configuration looks to me similar to the [shell] option from the configuration examples. There is a 1 per minute LOG3[per-minute]: OCSP: SSL_get_certificate line at the log file. Does it a bug? This wasn't discussed 3 weeks ago at [How to get rid of "No OCSP stapling response received" warning?](https://www.stunnel.org/mailman3/hyperkitty/list/stunnel-users@st…, was it?

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Client mode certificate pinning
by Ian Pilcher 11 Oct '25

11 Oct '25

Is $SUBJECT possible? I use stunnel to connect to my old "smart" switches that don't support modern TLS protocols, ciphers, etc. Recently, their existing certificates all expired, and I tried to install new certificates on all of them, only to discover that they won't accept my new CA certificate, because it was signed with a 3072-bit key. I could go through the trouble of generating a separate CA certificate with a 2048-bit key, sign new certificates with that key, etc., etc., but it starts to seem a bit silly at that point. Far better to simply generate a self-signed certificate for each switch and configure stunnel to only accept that particular certificate (i.e. "pin" it). Is this possible with stunnel? If so, how would I go about configuring it to do this? (Search engines are telling me to use "verify = 4", but stunnel(8) says that option is obsolete.) TIA! -- ======================================================================== If your user interface is intuitive in retrospect ... it isn't intuitive ========================================================================

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How to get rid of "No OCSP stapling response received" warning?
by Ian Pilcher 25 Sep '25

25 Sep '25

I use stunnel to connect to my old "smart" switches from modern browsers. Here is a subset of the configuration for one of the switches. [switch1-frontend] sni = frontend:switch1.penurio.us CAfile = /etc/ipa/ca.crt cert = /etc/pki/tls/certs/stunnel/switch1.crt key = /tmp/keys/switch1.key connect = 127.255.255.254:8081 [switch1-backend] client = yes accept = 127.255.255.254:8081 connect = 172.31.4.1:443 verifyChain = yes checkHost = switch1.penurio.us CAfile = /etc/ipa/ca.crt sslVersion = TLSv1 ciphers = DHE-RSA-AES256-SHA options = ALLOW_UNSAFE_LEGACY_RENEGOTIATION securityLevel = 0 OCSPrequire = no OCSPaia = no Everything works, execept that every connection produces a bright red warning in my log: OCSP: No OCSP stapling response received I've read up on OCSP stapling, that this seems to mean that the switch isn't including an OCSP response in its TLS handshake. (Hardly surprising, given its age.) How can I tell stunnel to not request/expect an OCSP response from the switch (or at least to not log the missing OCSP response as a warning)? -- ======================================================================== If your user interface is intuitive in retrospect ... it isn't intuitive ========================================================================

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stunnel FIPS mode 140-2/ Other Modes
by mehmet ozisik 19 Sep '25

19 Sep '25

Hi All, I would like to ask a question about stunnel fips mode. There are lots of question and answers on the internet related with this, but I could not find any answer related with mine. I am compiling with openssl (auto detecting fips) . Here is a part of confgiure output : checking for FIPS_mode_set... yes configure: FIPS mode detected So I am thinking that fips also is being included. Then I try to run stunnel on target platform (in stunnel.conf fips=yes) and it gives below error : Compiled/running with OpenSSL 0.9.8w-fips 23 Apr 2012 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file stunnel.conf FIPS_mode_set: 2D06906E: error:2D06906E:FIPS routines:FIPS_CHECK_INCORE_FINGERPRINT:fingerprint does not match there are lots of information about this errror on internet. Then when I configure stunnel.conf with fips=no, stunnel is running successfully. I know that fips=yes means that enables FIPS 140-2 mode and I guess my fips canister does not supoort fips 140-2 mode (I do not know which fips mode it has supported). Now my question is coming : When I set fips=no, stunnel also starts with other available fips modes which the canister included? Or it skips running fips mode completely? Plase inform me if anyone has any idea? Regards

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Stunnel, Gmail and Outlook Express
by landjonline＠hotmail.com 01 Sep '25

01 Sep '25

I have Outlook Express and my email addresses are Gmail. Is there a way to get Gmail to work with Outlook Express using Stunnel? Thanks

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Using CAStore on Android (stunnel.conf)
by smf.forum1＠ntlworld.com 31 Jul '25

31 Jul '25

I have build stunnel with a few changes to run in a QThread (Qt 6.9.1) for Android. My Qt App starts stunnel at the start of execution and stops it when my Qt application exits. This all works fine (I need to review and clean up my stunnel changes before I use my solution for real) but I cannot get certification to work, here are two test runs one with verify set to 0 (works) and verify set to 2 (fails). What needs to change in my stunnel.conf file ? Thanks. (obfuscated details) stunnel.conf foreground = yes debug = 6 [mariadb] CAstore = /data/misc/user/0/cacerts-added CApath = /data/misc/user/0/cacerts-added client = yes accept = 127.0.0.1:3307 connect = remote_server:3307 verify = 0 Works: I/stunnel : LOG6[ui]: Initializing inetd mode configuration I/stunnel : LOG5[ui]: stunnel 5.75 on android-mobile-device platform I/stunnel : LOG5[ui]: Compiled/running with OpenSSL 3.1.1 30 May 2023 I/stunnel : LOG5[ui]: Threading:PTHREAD Sockets:SELECT,IPv4 TLS:ENGINE,OCSP,PSK,SNI I/stunnel : LOG6[ui]: Initializing inetd mode configuration I/stunnel : LOG5[ui]: Reading configuration from buffer 0x7280e409b640 I/stunnel : LOG5[ui]: UTF-8 byte order mark not detected I/stunnel : LOG6[ui]: Compression disabled I/stunnel : LOG6[ui]: Initializing service [mariadb] I/stunnel : LOG6[ui]: stunnel default security level set: 2 I/stunnel : LOG6[ui]: Session resumption enabled I/stunnel : LOG6[ui]: Configured trusted server CA: C=AU, ST=Florida, L=York, O=Home, OU=Whiskey, CN=Michael, emailAddress=eric.admin(a)intheether.com W/stunnel : LOG4[ui]: Service [mariadb] needs authentication to prevent MITM attacks I/stunnel : LOG6[ui]: DH initialization skipped: client section I/stunnel : LOG5[ui]: Configuration successful I/stunnel : LOG6[ui]: Service [mariadb] (FD=117) bound to 127.0.0.1:3307 I/stunnel : LOG6[ui]: Accepting new connections I/stunnel : LOG6[per-day]: Executing per-day jobs I/stunnel : LOG6[per-day]: Per-day jobs completed in 0 seconds I/stunnel : LOG5[0]: Service [mariadb] accepted connection from 127.0.0.1:36802 I/stunnel : LOG6[0]: s_connect: connecting 192.168.0.1:3307 I/stunnel : LOG5[0]: s_connect: connected 192.168.0.1:3307 I/stunnel : LOG5[0]: Service [mariadb] connected remote server from 10.0.2.16:58660 I/stunnel : LOG6[0]: SNI: sending servername: remote_server I/stunnel : LOG6[0]: Peer certificate not required I/stunnel : LOG6[0]: Received trusted client CA: C=AU, ST=Florida, L=York, O=Home, OU=Whiskey, CN=Michael, emailAddress=eric.admin(a)intheether.com I/stunnel : LOG6[0]: CERT: Certificate verification disabled I/stunnel : LOG6[0]: CERT: Certificate verification disabled I/stunnel : LOG6[0]: OCSP: Certificate chain verification disabled I/stunnel : LOG6[0]: TLS connected: new session negotiated I/stunnel : LOG6[0]: TLSv1.3 ciphersuite: TLS_AES_256_GCM_SHA384 (256-bit encryption) I/stunnel : LOG6[0]: Peer temporary key: X25519, 253 bits I/stunnel : LOG6[0]: Session id: 90DD6325CCBC47C3F8F560C36F76755B4959E6A8421DD97B751E37FDD1DCCAC7 I/stunnel : LOG6[0]: Session id: 24345E21753FE3B254CA089FB7621C1481B523E72EB9571DDF7A366B5E89E834 stunnel.conf foreground = yes debug = 6 [mariadb] CAstore = /data/misc/user/0/cacerts-added CApath = /data/misc/user/0/cacerts-added client = yes accept = 127.0.0.1:3307 connect = remote_server:3307 verify = 2 Fails: I/stunnel : LOG6[ui]: Initializing inetd mode configuration I/stunnel : LOG5[ui]: stunnel 5.75 on android-mobile-device platform I/stunnel : LOG5[ui]: Compiled/running with OpenSSL 3.1.1 30 May 2023 I/stunnel : LOG5[ui]: Threading:PTHREAD Sockets:SELECT,IPv4 TLS:ENGINE,OCSP,PSK,SNI I/stunnel : LOG6[ui]: Initializing inetd mode configuration I/stunnel : LOG5[ui]: Reading configuration from buffer 0x7280e409b0a0 I/stunnel : LOG5[ui]: UTF-8 byte order mark not detected I/stunnel : LOG6[ui]: Compression disabled I/stunnel : LOG6[ui]: Initializing service [mariadb] I/stunnel : LOG6[ui]: stunnel default security level set: 2 I/stunnel : LOG6[ui]: Session resumption enabled I/stunnel : LOG6[ui]: Configured trusted server CA: C=AU, ST=Florida, L=York, O=Home, OU=Whiskey, CN=Michael, emailAddress=eric.admin(a)intheether.com W/stunnel : LOG4[ui]: Service [mariadb] uses "verifyChain" without subject checks W/stunnel : LOG4[ui]: Use "checkHost" or "checkIP" to restrict trusted certificates I/stunnel : LOG6[ui]: DH initialization skipped: client section I/stunnel : LOG5[ui]: Configuration successful I/stunnel : LOG6[ui]: Service [mariadb] (FD=114) bound to 127.0.0.1:3307 I/stunnel : LOG6[ui]: Accepting new connections I/stunnel : LOG6[per-day]: Executing per-day jobs I/stunnel : LOG6[per-day]: Per-day jobs completed in 0 seconds I/stunnel : LOG5[0]: Service [mariadb] accepted connection from 127.0.0.1:39238 I/stunnel : LOG6[0]: s_connect: connecting 192.168.0.1:3307 I/stunnel : LOG5[0]: s_connect: connected 192.168.0.1:3307 I/stunnel : LOG5[0]: Service [mariadb] connected remote server from 10.0.2.16:59154 I/stunnel : LOG6[0]: SNI: sending servername: remote_server I/stunnel : LOG6[0]: Peer certificate required I/stunnel : LOG6[0]: Received trusted client CA: C=AU, ST=Florida, L=York, O=Home, OU=Whiskey, CN=Michael, emailAddress=eric.admin(a)intheether.com W/stunnel : LOG4[0]: CERT: Pre-verification error: certificate not found in local repository: self-signed certificate W/stunnel : LOG4[0]: Rejected by CERT at depth=0: C=PL, ST=Mazovia Province, L=Warsaw, O=Stunnel Developers, OU=Provisional CA, CN=localhost E/stunnel : LOG3[0]: SSL_connect: tls_post_process_server_certificate@ssl/statem/statem_clnt.c:1890: error:0A000086:SSL routines::certificate verify failed I/stunnel : LOG5[0]: Connection closed/reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket I/stunnel : LOG6[ui]: Child process 17669 finished with code 0

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Android Stunnel 64bit version
by emxacademy＠gmail.com 19 Jul '25

19 Jul '25

Hello everyone, I've been searching online but still haven’t found a clear or working method to build a 64-bit version of the Android stunnel executable. Since most Android devices now run on 64-bit architecture, the 32-bit version available on the official website no longer works on many phones. If anyone has experience with this or can guide me through the proper way to compile a 64-bit version, I’d really appreciate your help. Thanks in advance!

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Error message when trying to set Stunnel as a start up app
by Edward Smithson 18 Jul '25

18 Jul '25

Hello Stunnel mailing list, We are trying to set Stunnel (5.75) to automatically open as a start up app on Windows 11. When the PC powers up, it gives this error message: stunnel.exe - System Error The code execution cannot proceed because libcrypto-3-x64.dll was not found. Reinstalling the program may fix this problem. We have tried reinstalling, but to no avail. NB, Stunnel works fine if opened manually. This was not an issue with Windows 10. Has anyone else had this problem (and solved it)? Many thanks, Ed Smithson Ed Smithson Reader Services Librarian Nuffield College, Oxford, OX1 1NF +44(0) 1865 278551 [cid:[email protected]]<https://bsky.app/profile/nuffieldlibrary.bsky.social>[cid:[email protected]]<https://www.facebook.com/NuffieldCollegeLibrary>[cid:[email protected]]<https://www.instagram.com/nuffieldlibrary/> [cid:[email protected]]<https://www.nuffield.ox.ac.uk/>

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stunnel with aurora postgreSQL
by Grube, Rolf | Oberender AG 25 Jun '25

25 Jun '25

Hi everybody, Does anybody has already established a connection to AWS aurora postgreSQL with stunnel? I cant establish a connection and it may be an issue with channel binding. My config looks like this: ; Sample stunnel configuration file for Win64 by Michal Trojnara 1998-2025 ; Some options used here may be inadequate for your particular configuration ; This sample file does *not* represent stunnel.conf defaults ; Please consult the manual for detailed description of available options ; ************************************************************************** ; * Global options * ; ************************************************************************** ; Debugging stuff (may be useful for troubleshooting) debug = 7 output = stunnel.log ; Enable FIPS 140-2 mode if needed for compliance fips = yes ; The CNG engine allows to integrate stunnel with the Windows Cryptography API: ; Next Generation (CNG) for authentication with private keys stored in the ; Windows certificate store. It serves as a drop-in replacement for the legacy ; OpenSSL Cryptography API (CAPI) engine. ; https://www.stunnel.org/cng-engine.html ; Each section using this feature also needs the "engineId = cng" option engine = cng ; The pkcs11 engine allows for authentication with cryptographic ; keys isolated in a hardware or software token ; MODULE_PATH specifies the path to the pkcs11 module shared library, ; such as softhsm2-x64.dll or opensc-pkcs11.dll ; IMPORTANT: A 64-bit stunnel requires 64-bit PKCS#11 modules ; Each section using this feature also needs the "engineId = pkcs11" option ;engine = pkcs11 ;engineCtrl = MODULE_PATH:softhsm2-x64.dll ;engineCtrl = PIN:1234 ; ************************************************************************** ; * Service defaults may also be specified in individual service sections * ; ************************************************************************** ; Enable support for the insecure SSLv3 protocol ;options = -NO_SSLv3 ; These options provide additional security at some performance degradation ;options = SINGLE_ECDH_USE ;options = SINGLE_DH_USE ; ************************************************************************** ; * Include all configuration file fragments from the specified folder * ; ************************************************************************** ;include = conf.d ; ************************************************************************** ; * Service definitions (at least one service has to be defined) * ; ************************************************************************** [postgreSQL_TLS] client = yes ;engineId = cng accept = 5433 connect = xxx.rds.amazonaws.com:5432 protocol = pgsql CAfile = C:\cert\xxx-bundle.pem verifyChain = yes checkHost = xxx.rds.amazonaws.com Thanks for any recommendations. Best regards Rolf Grube, MBA Senior Manager <https://www.credly.com/badges/443267d6-0d25-4fc3-9eee-f9654f6f3ee1/public_u rl> Oberender AG Elsenheimerstraße 59 | 80687 München t: +49 89 8207516-0 | m: +49 173 2035 133 <mailto:[email protected]> rolf.grube(a)oberender.com <http://www.oberender.com/> www.oberender.com Vorsitzender des Aufsichtsrats: Dipl.-Volkswirtin Irmtraut Gürkan Vorstand: Jan Hacker (Vorsitzender), Jochen Baierlein Handelsregister: Amtsgericht Bayreuth, HRB 4267 Sitz der Gesellschaft: Bayreuth Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren, sowie die unbefugte Weitergabe dieser Mail sind nicht gestattet.

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Duplicate Received trusted client CA messages
by Sean Burford 18 Jun '25

18 Jun '25

Hi, While configuring stunnel to connect as a client to a TLS server that requires client certificate auth (known as mutual TLS auth), I noticed that each new connection generates lots (up to hundreds) of duplicate logs like: 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA I expect one log per trusted client CA provided by the server. Openssl s_client -msg shows that the server only sends a small CertificateRequest. Stunnel logs show that only one connection is made. This only happens if the server offers exactly one trusted client CA. If multiple client CA options are offered by the server then a single log entry is recorded for each. What appears to be happening is that OpenSSL’s state machine generates lots of info callbacks (the number depends on latency). This appears to be harmless except for the excessive logging. I’m running stunnel 5.75 against OpenSSL 3.5.0 (compiled with enable-weak-ssl-ciphers, enable-ssl3 and enable-ssl3-method): $ stunnel [ ] Initializing inetd mode configuration [ ] Clients allowed=125 [.] stunnel 5.75 on sparc-sun-solaris2.10 platform [.] Compiled/running with OpenSSL 3.5.0 8 Apr 2025 [.] Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,OCSP,PSK,SNI [ ] errno: (*(___errno())) … $ openssl version OpenSSL 3.5.0 8 Apr 2025 (Library: OpenSSL 3.5.0 8 Apr 2025) This is probably NOT caused by an OpenSSL 3.5.0 behaviour change, I also see duplicate messages from the public stunnel build running on Windows: [ ] Initializing inetd mode configuration [ ] Running on Windows 6.2 [ ] No limit detected for the number of clients [.] stunnel 5.74 on x64-pc-mingw32-gnu platform [.] Compiled/running with OpenSSL 3.3.2 3 Sep 2024 [.] Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI [ ] errno: (*_errno()) To diagnose this further, I modified stunnel src/ctx.c info_callback() to log the TLS state in callbacks: //#if 0 // s_log(LOG_DEBUG, "state = %x", state); state_string=SSL_state_string_long(ssl); s_log(LOG_DEBUG, "TLS state (where %08X state %08X): %s", where, state, state_string); //#endif This shows that there are many callbacks from where SSL_CB_ACCEPT_EXIT and one final callback from SSL_CB_ACCEPT_LOOP: 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA 2025.06.18 10:23:58 LOG7[0]: TLS state (where 00001002 state 00000008): SSLv3/TLS read server certificate request 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA 2025.06.18 10:23:58 LOG7[0]: TLS state (where 00001002 state 00000008): SSLv3/TLS read server certificate request 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA 2025.06.18 10:23:58 LOG7[0]: TLS state (where 00001002 state 00000008): SSLv3/TLS read server certificate request 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA 2025.06.18 10:23:58 LOG7[0]: TLS state (where 00001001 state 00000008): SSLv3/TLS read server certificate request 2025.06.18 10:23:58 LOG6[0]: Received trusted client CA: CN=Example CA 2025.06.18 10:23:58 LOG7[0]: TLS state (connect): SSLv3/TLS read server certificate request Modifying info_callback to look for SSL_CB_LOOP in where suppresses the excess messages: /* log the client certificate request (if received) */ #ifndef SSL3_ST_CR_CERT_REQ_A if(state==TLS_ST_CR_CERT_REQ && *where & SSL_CB_LOOP*) #else if(state==SSL3_ST_CR_CERT_REQ_A && *where & SSL_CB_LOOP*) #endif print_CA_list("Received trusted client CA", SSL_get_client_CA_list(ssl)); Here’s my config: debug=info [outbound-http-to-https-mtls] accept = 127.0.0.1:8447 connect = 127.0.0.1:8445 client = yes ; verify 2 - verify peer certificate chain verify = 2 sni = www.example.com checkHost = www.example.com verifyChain = yes CAfile = /export/home/user/stunnel/trusted-ca-certs.pem ; Authenticate ourselves to peer using a client certificate. cert = /export/home/user/stunnel/user.ecdsa-p256.pem key = /export/home/user/stunnel/user.ecdsa-p256.key -- Thanks, Sean Burford

1 0

[PATCH 0/3] Improve stunnel performance by ~17%
by Edwin Torok 12 Jun '25

12 Jun '25

Hello, Flamegraph profiling on stunnel has shown that most time is NOT spent in encryption/decryption, but in sending/receiving data. Experimental setup: ``` CPU: 2x 18-core Intel Xeon Gold 6354 NIC: Intel E810-XXV, 100 Gbit/s Kernel: 6.14.8-300.fc42.x86_64 x86_64 Mem: 251.32 GiB OS: Fedora Linux 42 openssl version: OpenSSL 3.2.4 11 Feb 2025 (Library: OpenSSL 3.2.4 11 Feb 2025) stunnel: 5.75 from git ``` Network, encryption and memory copy speeds converted into Gbit/s on the above HW: ``` iperf3: 40Gbit/s openssl speed -evp aes-256-gcm: 72Gbit/s perf bench memcpy: 100Gbit/s ``` Under ideal conditions we should be able to achieve at most ~20.5Gbit/s, however I only measured ~7.6Gbit/s. The scripts that I used to perform measurements are included in the attached patch 3. See also related discussion on curl: https://github.com/curl/curl/pull/17548 Enabling readahead, avoiding excessive alloc/free of buffers, increasing buffer sizes, and improving buffer handling can all improve performance. For now I'm sending just the first small patches as proofs of concept, each of them one-liners. I hope you can include these in some form in the next release. Eventually these should probably be exposed as configuration flags in stunnel.conf, I can help implementing that, or I can leave implementing that to you if you prefer. In fact readahead was enabled in previous versions of stunnel, and then disabled again, so I assume you ran into some bugs with it on certain protocols? Increasing the buffer size is not a clear win (as with curl), due to the excessive use of memmove/memset, and that SSL_read/SSL_write only still processes 1 TLS record at a time. I have some further changes that can improve that, but the patches are larger and I haven't finished testing them for correctness yet. Please let me know if you'd want these as patches, or if you'd rather implement them yourself. Edwin Török (3): openssl: enable readahead openssl: disable SSL_MODE_RELEASE_BUFFERS Benchmark scripts src/ctx.c | 5 +- tests/benchmark/benchmark.sh | 120 +++++++++++++++++++++++ tests/benchmark/launch.sh | 185 +++++++++++++++++++++++++++++++++++ 3 files changed, 309 insertions(+), 1 deletion(-) create mode 100644 tests/benchmark/benchmark.sh create mode 100755 tests/benchmark/launch.sh -- 2.43.5

4 6

Is TLS 1.2 supported with stunnel 5.01
by joverton＠vital-soft.com 02 Jun '25

02 Jun '25

I have searched online, but was unable to fine any definitive answer on the minimum version of stunnel required for TLS 1.2. I have a client using stunnel 5.01 with our solution and they want to activate TLS 1.2. Their setup looks like this: 2014.05.15 13:38:22 LOG5[10132]: stunnel 5.01 on x86-pc-msvc-1500 platform 2014.05.15 13:38:22 LOG5[10132]: Compiled/running with OpenSSL 1.0.1g-fips 7 Apr 2014 2014.05.15 13:38:22 LOG5[10132]: Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS 2014.05.15 13:38:22 LOG5[10132]: Reading configuration from file stunnel.conf 2014.05.15 13:38:22 LOG5[10132]: FIPS mode disabled 2014.05.15 13:38:22 LOG5[10132]: Configuration successful Everything works fine without requiring TLS 1.2, but when that is required, we get the following error: 2025.05.14 07:04:45 LOG7[3796]: SSL state (connect): before/connect initialization 2025.05.14 07:04:45 LOG7[3796]: SSL state (connect): SSLv3 write client hello A 2025.05.14 07:04:45 LOG7[3796]: SSL alert (read): fatal: protocol version 2025.05.14 07:04:45 LOG3[3796]: SSL_connect: 1409442E: error:1409442E:SSL routines:SSL3_READ_BYTES:tlsv1 alert protocol version 2025.05.14 07:04:45 LOG5[3796]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2025.05.14 07:04:45 LOG7[3796]: Remote socket (FD=840) closed 2025.05.14 07:04:45 LOG7[3796]: Local socket (FD=832) closed - Do we need to change anything in stunnel.conf? - Do we need to upgrade stunnel? Many Thanks, John

4 5

Re: stunnel 5.75 released
by Christian Ullrich 28 May '25

28 May '25

* Michal Trojnara wrote: > I have released version 5.75 of stunnel. > > ### Version 5.75, 2025.05.26, urgency: MEDIUM Hello, why does the Windows release include "libgcc_s_seh-1.dll"? I cannot find anything that uses it, and a basic configuration works without any attempts to load it. I went to some lengths to find indications it might be loaded dynamically, but found nothing. Thanks, -- Christian

2 1

stunnel 5.75 released
by Michał Trojnara 26 May '25

26 May '25

Dear Users, I have released version 5.75 of stunnel. ### Version 5.75, 2025.05.26, urgency: MEDIUM * Security bugfixes - OpenSSL DLLs updated to version 3.4.1. - OpenSSL FIPS Provider updated to version 3.1.2. * Bugfixes - Fixed infinite loop triggered by OCSP URL parsing errors (thx to Richard Könning for reporting). - Fixed OPENSSL_NO_OCSP build issues (thx to Dmitry Mostovoy for reporting). - Fixed default curve selection in FIPS mode with OpenSSL 3.4+. - Fixed tests with modern Python versions. - Fixed tests with multiple OpenSSL versions installed. * Features - Added provider URI support for "cert" and "key" options. - Added new "CAstore" service-level option (OpenSSL 3.0+). - Added "provider" (OpenSSL 3.0+), "providerParameter" (OpenSSL 3.5+), and "setEnv" global options. - Key file/URI path added to passphrase prompt on Unix. - PKCS#11 provider installed on Windows. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 0c1ef0ed85240974dccb94fe74fb92d6383474c7c0d10e8796d1f781a3ba5683 stunnel-5.75.tar.gz 18ec3b83bda9143c79479ecdc1e3ecf515eeb8a8b11e6ea3a6856cd77399317d stunnel-5.75-win64-installer.exe d1a04ec51840d8cbf5fb6d897d2eb999af573b5b66268fdec109cddaff2acfb7 stunnel-5.75-android.zip Best regards, Mike

1 0

Preserving Client IP Address
by atritium＠hushmail.com 21 May '25

21 May '25

Has anyone followed the stunnel man page instructions and been able to successfully pass/preserve the connecting client's original IP address? Checking history on this issue back to 2010, it looks people with problems, no reports of success. Though it seems so fundamental, you would hope it was smooth as the man page indicates For example, I set up an iptables 'mangle' table for DIVERT routing, ip rule, ip route, etc, for the server as given in the stunnel man page for a Red Hat 8 system. When the stunnel server is then also configured with "transparent = source" and restarted, the remote-initiated connection -hangs- without connecting for a few seconds before closing. Take out "transparent = source" from the server config, and the connection works successfully (though the client IP address is not available to applications). Logs are the same up until the point (shown below), which shows the "hanging/failed" case timing out after reporting "Cannot assign an AF=2 address an AF=10 socket". Don't know what the "Cannot assign AF ..." refers to, or how to address it, but the process goes downhill and hangs after that. 7111 is the open port stunnel is monitoring. 2025.05.21 10:07:16 LOG7[0]: Cannot assign an AF=2 address an AF=10 socket 2025.05.21 10:07:16 LOG6[0]: IP_TRANSPARENT socket option set 2025.05.21 10:07:16 LOG6[0]: bind succeeded on the original port 2025.05.21 10:07:16 LOG6[0]: s_connect: connecting 127.0.0.1:7111 2025.05.21 10:07:16 LOG7[0]: s_connect: s_poll_wait 127.0.0.1:7111: waiting 10 seconds 2025.05.21 10:07:16 LOG7[0]: FD=6 events=0x2001 revents=0x0 2025.05.21 10:07:16 LOG7[0]: FD=11 events=0x2005 revents=0x1 2025.05.21 10:07:26 LOG3[0]: s_connect: s_poll_wait 127.0.0.1:7111: TIMEOUTconnect exceeded 2025.05.21 10:07:26 LOG3[0]: No more addresses to connect 2025.05.21 10:07:26 LOG5[0]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2025.05.21 10:07:26 LOG7[0]: local_rfd/local_wfd reset (FD=3) 2025.05.21 10:07:26 LOG7[0]: Local descriptor (FD=3) closed 2025.05.21 10:07:26 LOG7[0]: Service [TLS SERVER] finished (0 left) The log for the successful case when "transparent = source is NOT specified in server config) instead says: 2025.05.21 09:59:58 LOG6[0]: s_connect: connecting ::1:7111 2025.05.21 09:59:58 LOG7[0]: s_connect: s_poll_wait ::1:7111: waiting 10 seconds 2025.05.21 09:59:58 LOG7[0]: FD=6 events=0x2001 revents=0x0 2025.05.21 09:59:58 LOG7[0]: FD=11 events=0x2005 revents=0x1 2025.05.21 09:59:58 LOG5[0]: s_connect: connected ::1:7111 2025.05.21 09:59:58 LOG6[0]: persistence: ::1:7111 cached 2025.05.21 09:59:58 LOG5[0]: Service [TLS SERVER] connected remote server from ::1:49806 2025.05.21 09:59:58 LOG7[0]: Setting remote socket options (FD=11) Any insight on what "Cannot assign an AF=2 address an AF=10 socket" is and how to fix it to preserve client IP address? stunnel is running as root, setuid is not used. I might not correctly understand the man page comment "This option is currently available in: Remote mode (connect option) on Linux >=2.6.28", but think it means a normal external connection request. Hopefully not a special configuration on the client side.

1 0

SSL_CTX_load_verify_locations: Peer suddenly disconnected
by lynn9a＠yahoo.com 13 May '25

13 May '25

Hi, All When we try to start stunnel(stunnel 5.67, wolfSSL5.6.4 on linux), there is an error randomly happened like following, anybody knows why this happen and how to fix this? Thanks May 9 09:09:01 [ ] Initializing inetd mode configuration May 9 09:09:01 [ ] Clients allowed=500 May 9 09:09:01 [.] stunnel 5.67 on arm-oe-linux-gnueabi platform May 9 09:09:01 [.] Compiled/running with wolfSSL 5.6.4 May 9 09:09:01 [.] Threading:PTHREAD Sockets:POLL,IPv6,SYSTEMD TLS:OCSP,PSK,SNI May 9 09:09:01 [ ] errno: (*__errno_location ()) May 9 09:09:01 [ ] Initializing inetd mode configuration May 9 09:09:01 [.] Reading configuration from file /opt/config/stunnel.conf May 9 09:09:01 [.] UTF-8 byte order mark not detected May 9 09:09:01 [ ] No PRNG seeding was required May 9 09:09:01 [ ] Initializing service [xxxHost] May 9 09:09:01 [ ] stunnel default security level set: 2 May 9 09:09:01 [ ] Ciphers: TLS_AES_256_GCM_SHA384 May 9 09:09:01 [ ] TLSv1.3 ciphersuites: TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256 May 9 09:09:01 [ ] TLS options: 0x4D474C4C003000 (+0x0, -0x0) May 9 09:09:01 [ ] Session resumption enabled May 9 09:09:01 [ ] Loading certificate from file: ./config/client.pem May 9 09:09:01 [ ] Certificate loaded from file: ./config/client.pem May 9 09:09:01 [ ] Loading private key from file: ./config/client.key May 9 09:09:01 [:] Insecure file permissions on ./config/client.key May 9 09:09:01 [ ] Private key loaded from file: ./config/client.key May 9 09:09:01 [ ] Private key check succeeded May 9 09:09:01 [!] SSL_CTX_load_verify_locations: Peer suddenly disconnected May 9 09:09:01 [!] Service [xxxHost]: Failed to initialize TLS context May 9 09:09:01 [!] Configuration failed May 9 09:09:01 [ ] Deallocating temporary section defaults May 9 09:09:01 [ ] Deallocating section [xxxHost]

3 2

Using intermediate CA as a trust anchor in stunnel
by Vít Holásek 30 Mar '25

30 Mar '25

Hi, I'm trying to setup stunnel to trust only certificates issued by intermediate CA and not other CAs issues by the same root CA. I came across this discussion about the same topic: https://www.stunnel.org/ mailman3/hyperkitty/list/stunnel-users(a)stunnel.org/thread/DUF6C6 BRNFVAWVCDIGXPUDTAPZR5KV5W/. I tested described options but it always authenticates also other sub CAs, because the whole chain must be always supplied in configured CAfile or CApath. In my opinion, the proper solution would be to add "partial chain" OpenSSL configuration option to stunnel config. This would allow admin to decide how intermediate CA will be verified. What do you think about that? See corresponding OpenSSL issue: https://github.com/openssl/openssl/issues/ 7871. Thanks Vit

1 0

stunnel - client conexion close by TLS alert (write) fatal decode error
by Rodigo Alvarez 07 Mar '25

07 Mar '25

Hi All! I would appreciate any clue to solve the problem we are having with a client mode service that stopped working this week (we verified that the service works directly without stunnel). The error I identify in the trace is the following: "TLS alert (write): fatal: decode error" Stunnel Config (windows version): [afip-prod-fce] client = yes accept = ARSASSRV4DMS06:1031 connect = serviciosjava.afip.gob.ar:443 debug = 7 ws: https://serviciosjava.afip.gob.ar/wsfecred/FECredService Complete trace: 2024.01.24 09:28:46 LOG5[main]: stunnel 5.71 on x64-pc-mingw32-gnu platform 2024.01.24 09:28:46 LOG5[main]: Compiled/running with OpenSSL 3.1.3 19 Sep 2023 2024.01.24 09:28:46 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,OCSP,PSK,SNI 2024.01.24 09:28:46 LOG5[main]: Reading configuration from file C:\Program Files (x86)\stunnel\config\stunnel.conf 2024.01.24 09:28:46 LOG5[main]: UTF-8 byte order mark detected 2024.01.24 09:28:46 LOG5[main]: FIPS mode disabled 2024.01.24 09:28:46 LOG4[main]: Service [afip-prod-fce] needs authentication to prevent MITM attacks 2024.01.24 09:28:46 LOG5[main]: Configuration successful 2024.01.24 09:29:23 LOG7[0]: Service [afip-prod-fce] started 2024.01.24 09:29:23 LOG7[0]: Setting local socket options (FD=892) 2024.01.24 09:29:23 LOG7[0]: Option TCP_NODELAY set on local socket 2024.01.24 09:29:23 LOG5[0]: Service [afip-prod-fce] accepted connection from 10.70.162.24:57723 2024.01.24 09:29:23 LOG6[0]: s_connect: connecting 200.1.116.19:443 2024.01.24 09:29:23 LOG7[0]: s_connect: s_poll_wait 200.1.116.19:443: waiting 10 seconds 2024.01.24 09:29:23 LOG7[0]: FD=896 ifds=rwx ofds=--- 2024.01.24 09:29:24 LOG5[0]: s_connect: connected 200.1.116.19:443 2024.01.24 09:29:24 LOG5[0]: Service [afip-prod-fce] connected remote server from 10.72.0.69:64788 2024.01.24 09:29:24 LOG7[0]: Setting remote socket options (FD=896) 2024.01.24 09:29:24 LOG7[0]: Option TCP_NODELAY set on remote socket 2024.01.24 09:29:24 LOG7[0]: Remote descriptor (FD=896) initialized 2024.01.24 09:29:24 LOG6[0]: SNI: sending servername: serviciosjava.afip.gob.ar 2024.01.24 09:29:24 LOG6[0]: Peer certificate not required 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): before SSL initialization 2024.01.24 09:29:24 LOG7[0]: Initializing application specific data for session authenticated 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS write client hello 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS write client hello 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS read server hello 2024.01.24 09:29:24 LOG6[0]: CERT: Certificate verification disabled 2024.01.24 09:29:24 LOG6[0]: CERT: Certificate verification disabled 2024.01.24 09:29:24 LOG6[0]: CERT: Certificate verification disabled 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS read server certificate 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS read server key exchange 2024.01.24 09:29:24 LOG7[0]: OCSP stapling: Client callback called 2024.01.24 09:29:24 LOG6[0]: OCSP: Certificate chain verification disabled 2024.01.24 09:29:24 LOG6[0]: Client certificate not requested 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS read server done 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS write client key exchange 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS write change cipher spec 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS write finished 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS write finished 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS read change cipher spec 2024.01.24 09:29:24 LOG7[0]: TLS state (connect): SSLv3/TLS read finished 2024.01.24 09:29:24 LOG7[0]: New session callback 2024.01.24 09:29:24 LOG7[0]: Peer certificate was cached (6643 bytes) 2024.01.24 09:29:24 LOG6[0]: Session id: D63C79766AC02C9A3E8494AD528954A183E9F7C250856695BA05C16A2219A4B3 2024.01.24 09:29:24 LOG7[0]: 1 client connect(s) requested 2024.01.24 09:29:24 LOG7[0]: 1 client connect(s) succeeded 2024.01.24 09:29:24 LOG7[0]: 0 client renegotiation(s) requested 2024.01.24 09:29:24 LOG7[0]: 0 session reuse(s) 2024.01.24 09:29:24 LOG6[0]: TLS connected: new session negotiated 2024.01.24 09:29:24 LOG6[0]: TLSv1.2 ciphersuite: ECDHE-RSA-AES128-GCM-SHA256 (128-bit encryption) 2024.01.24 09:29:24 LOG6[0]: Peer temporary key: ECDH, P-256, 256 bits 2024.01.24 09:29:24 LOG7[0]: Compression: null, expansion: null 2024.01.24 09:29:24 LOG7[0]: Remove session callback 2024.01.24 09:29:24 LOG7[0]: TLS alert (write): fatal: decode error 2024.01.24 09:29:24 LOG6[0]: TLS socket closed (SSL_read) 2024.01.24 09:29:24 LOG7[0]: Sent socket write shutdown 2024.01.24 09:29:24 LOG5[0]: Connection closed: 1755 byte(s) sent to TLS, 634 byte(s) sent to socket 2024.01.24 09:29:24 LOG7[0]: Remote descriptor (FD=896) closed 2024.01.24 09:29:24 LOG7[0]: Local descriptor (FD=892) closed 2024.01.24 09:29:24 LOG7[0]: Service [afip-prod-fce] finished (0 left) Thank you! Kind regards, Rodrigo.

3 3

stunnel warning: SSL_accept: ../ssl/record/ssl3_record.c:354: error:0A00010B:SSL routines::wrong version number
by Marcel de Rooy 23 Jan '25

23 Jan '25

Hi, Taking this opportunity to ask a question on the mentioned warning. In our stunnel setup (stunnel server in a Docker container on Linux, version 5.68 and windows clients on version 5.73, no certificate verification) I am seeing every minute the following lines in stunnel.log on the server side: 2025.01.20 04:12:27 LOG5[0]: Service [siptest] accepted connection from 172.20.23.1:46658 2025.01.20 04:12:27 LOG3[0]: SSL_accept: ../ssl/record/ssl3_record.c:354: error:0A00010B:SSL routines::wrong version number 2025.01.20 04:12:27 LOG5[0]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket This is every minute, so 04:13:27 again, etc. The warning is there already shortly after container restart without active connections to our SIP devices. I only see it recently. And changing the server/client config with sslVersionMin = TLSv1.2 and sslVersionMax = TLSv1.3 did not resolve it. Since it comes back every minute, I was thinking in the direction of keepalive settings. But do keep alives need encryption? Probably not. Is this just an innocent bug in the stunnel code or could I still do something in my configuration to clear the warn? Thank you for your attention. Marcel de Rooy Rijksmuseum Netherlands xxx

3 4

How do I setup stunnel + openvpn for android (I already have the server running, I just need a android client, Sslsocks isn't working for some reason for me.)
by sharifkashif224＠gmail.com 23 Jan '25

23 Jan '25

I've tried using Sslsocks but it keeps giving me an error called unexpected eof while reading. This occurs when I try to initiate a connection via OpenVPN in android.

1 0

How do I use the android zip file provided in the download section in the stunnel website for android
by sharifkashif224＠gmail.com 22 Jan '25

22 Jan '25

I want to try connecting my openvpn server thats wrapped around stunnel onto my phone, any help will be appreciated!

1 0

Re: stunnel log file fills up with errors very fast
by Alan M Varghese (Nokia) 22 Jan '25

22 Jan '25

After digging into this a bit further, I was able to confirm that these "retries" are not created by stunnel itself. Rather, stunnel is simply trying to forward the connection attempts from NFS. Changing the NFS mount's "timeo" and "retrans" parameters affects duration for which NFS attempts to connect to the server. Thanks, Alan M Varghese

1 0

stunnel log file fills up with errors very fast
by Alan M Varghese (Nokia) 19 Jan '25

19 Jan '25

Hello stunnel users, With stunnel (version: 5.71) setup and running (used to secure NFSv4 mounts), when the network interface is brought down, a huge number of messages are written to the log file (configured with the "output" option) in a very short amount of time. Below are some sample logs: 2025.01.19 14:19:58 LOG5[1044766]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2025.01.19 14:19:58 LOG5[1044767]: Service [xxxxx] accepted connection from 127.0.0.1:994 2025.01.19 14:19:58 LOG3[1044767]: s_connect: connect 192.168.x.xx:xxxx: Network is unreachable (101) 2025.01.19 14:19:58 LOG3[1044767]: No more addresses to connect 2025.01.19 14:19:58 LOG5[1044767]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2025.01.19 14:19:58 LOG5[1044768]: Service [xxxxx] accepted connection from 127.0.0.1:994 2025.01.19 14:19:58 LOG3[1044768]: s_connect: connect 192.168.x.xx:xxxx: Network is unreachable (101) 2025.01.19 14:19:58 LOG3[1044768]: No more addresses to connect ... This causes the log size to grow very quickly, sometimes overwhelming the filesystem. Log rotation alleviates this issue to some extent. But still, the archived logs would be filled with duplicate logs. This issue has been discussed by another user in the following thread: https://www.stunnel.org/mailman3/hyperkitty/list/[email protected]/… (Note, while the user in the thread above received "Connection refused" messages, here the error is "Network is unreachable". Otherwise, the behaviour with respect to logs is the same.) We would like to know if there is a way to control this connection behaviour from stunnel when "Network is unreachable" in such a manner. If not, is there a way to control/limit the log output from stunnel (without reducing the log level from default)? Steps to reproduce the issue: 1. Mount an NFSv4 filesystem using stunnel (configured to output logs to a file) 2. Bring down the network interfaces such that stunnel is not able to reach the configured server. (Please make sure to not lose access to the server while doing this.) 3. Wait ~300 seconds 4. Bring the interface(s) back up. 5. Examine the log size and contents. Thanks, Alan M Varghese

1 0

Issue with OCSP messages in stunnel 5.73 and above
by Alexander Moisseev 02 Jan '25

02 Jan '25

Hello, I am experiencing an issue with stunnel versions 5.73 and above where the server logs are continuously filled with the following message: "OCSP: SSL_get_certificate" This issue does not occur in version 5.72. I am using PSK for encryption and have not configured OCSP. Here are the details of my setup: [.] stunnel 5.74 on amd64-portbld-freebsd14.1 platform [.] Compiled with OpenSSL 3.0.13 30 Jan 2024 [.] Running with OpenSSL 3.0.15 3 Sep 2024 - Server configuration file: ``` setuid = stunnel setgid = nogroup pid = /var/run/stunnel/stunnel.pid [bayes] accept = 6478 connect = 6378 ciphers = PSK PSKsecrets = /usr/local/etc/stunnel/psk.txt cert = /usr/local/etc/stunnel/cert.pem key = /usr/local/etc/stunnel/private.key [fuzzy] accept = 6477 connect = 6377 ciphers = PSK PSKsecrets = /usr/local/etc/stunnel/psk.txt cert = /usr/local/etc/stunnel/cert.pem key = /usr/local/etc/stunnel/private.key ``` - Client configuration file: ``` setuid = stunnel setgid = nogroup pid = /var/run/stunnel/stunnel.pid [bayes] client = yes accept = localhost:6478 connect = host.example.org:6478 ciphers = PSK PSKsecrets = /usr/local/etc/stunnel/psk.txt [fuzzy] client = yes accept = localhost:6477 connect = host.example.org:6477 ciphers = PSK PSKsecrets = /usr/local/etc/stunnel/psk.txt ``` - Relevant log entries: ``` Dec 27 09:00:10 mx stunnel[22113]: LOG3[per-minute]: OCSP: SSL_get_certificate ``` As a temporary workaround, I generated a self-signed certificate and configured stunnel to use it. This has resolved the issue with OCSP messages. However, I believe this is not the intended behavior when using PSK without configuring OCSP. I would appreciate any help or guidance on how to properly configure stunnel to avoid this issue without requiring a self-signed certificate. Thank you, Alexander

3 4

STUNNEL Installation to Windows Failover Cluster
by John Pipolo 19 Dec '24

19 Dec '24

Hi Is there any documentation or how to on installing STUNNEL to a 2 node Windows failover cluster? thx

1 0

[Bug][5.73] stunnel segfault and coredump due to OCSP handling
by stunnel＠benary.org 15 Dec '24

15 Dec '24

Hi everyone, I've recently upgraded from NixOS 24.05 to 24.11 which went from stunnel 5.72 to 5.73 and have since had stunnel crash on me multiple times on different servers (pretty much identical setup however) due to what looks like a memory allocation race? Since 5.73 moved OCSP fetches to a thread, and the problem hasn't ever happened with 5.72 it sounds like an issue specific to that. Someone familiar with the codebase probably has a better idea of what's going on. Given that my updates happened somewhen mid last month and there have been no certificate renewals since (except for one that wouldn't affect the systems that were affected, thanks so much to crt.sh and CT existing) the error message of "OCSP routines::status expired" also seems out of place at least for the certificate itself (the staple may be expired, but stunnel should probably get a new one in that case which may have to do with the error in question). ``` Dec 06 04:43:02 shell stunnel[1124111]: LOG5[per-minute]: OCSP: Certificate accepted Dec 06 04:43:02 shell stunnel[1124111]: 2024.12.06 04:43:02 LOG5[per-minute]: OCSP: Certificate accepted Dec 06 04:43:02 shell stunnel[1124111]: LOG5[per-minute]: OCSP: Certificate accepted Dec 06 04:43:02 shell stunnel[1124111]: 2024.12.06 04:43:02 LOG5[per-minute]: OCSP: Certificate accepted Dec 06 04:43:02 shell stunnel[1124111]: LOG5[per-minute]: OCSP: Certificate accepted Dec 06 04:43:02 shell stunnel[1124111]: 2024.12.06 04:43:02 LOG5[per-minute]: OCSP: Certificate accepted Dec 06 04:43:56 shell stunnel[1124111]: LOG5[ui]: Log file reopened Dec 06 04:43:56 shell stunnel[1124111]: 2024.12.06 04:43:56 LOG5[ui]: Log file reopened Dec 06 04:44:02 shell stunnel[1124111]: LOG3[per-minute]: OCSP: OCSP_check_validity: crypto/ocsp/ocsp_cl.c:351: error:1380007D:OCSP routines::status expired Dec 06 04:44:02 shell stunnel[1124111]: 2024.12.06 04:44:02 LOG3[per-minute]: OCSP: OCSP_check_validity: crypto/ocsp/ocsp_cl.c:351: error:1380007D:OCSP routines::status expired Dec 06 04:44:02 shell stunnel[1124111]: 2024.12.06 04:44:02 LOG4[per-minute]: OCSP: Unknown verification status Dec 06 04:44:02 shell stunnel[1124111]: INTERNAL ERROR: Memory allocated in a different thread at ocsp.c, line 412 Dec 06 04:44:02 shell stunnel[1124111]: LOG4[per-minute]: OCSP: Unknown verification status Dec 06 04:44:02 shell stunnel[1124111]: INTERNAL ERROR: Memory allocated in a different thread at ocsp.c, line 412 Dec 06 04:44:02 shell systemd-coredump[282485]: Process 1124111 (stunnel) of user 988 terminated abnormally with signal 6/ABRT, processing... Dec 06 04:44:02 shell systemd[1]: Started Process Core Dump (PID 282485/UID 0). Dec 06 04:44:02 shell systemd-coredump[282486]: [🡕] Process 1124111 (stunnel) of user 988 dumped core. Module libgcc_s.so.1 without build-id. Module libcap.so.2 without build-id. Module stunnel without build-id. Stack trace of thread 1124120: #0 0x00007f9191c99a9c __pthread_kill_implementation (libc.so.6 + 0x92a9c) #1 0x00007f9191c47576 raise (libc.so.6 + 0x40576) #2 0x00007f9191c2f935 abort (libc.so.6 + 0x28935) #3 0x000056142e23e435 fatal_debug.cold (stunnel + 0xc435) #4 0x000056142e23eebc get_alloc_list_ptr (stunnel + 0xcebc) #5 0x000056142e23f0b9 str_detach_debug.part.0 (stunnel + 0xd0b9) #6 0x000056142e23f856 str_free_debug (stunnel + 0xd856) #7 0x000056142e259635 ocsp_stapling (stunnel + 0x27635) #8 0x000056142e25a18f per_minute_thread (stunnel + 0x2818f) #9 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #10 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 676245: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e241f82 client_run (stunnel + 0xff82) #3 0x000056142e2438fc client_thread (stunnel + 0x118fc) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 1124111: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e25b5f6 daemon_loop (stunnel + 0x295f6) #3 0x000056142e23e680 main (stunnel + 0xc680) #4 0x00007f9191c3127e __libc_start_call_main (libc.so.6 + 0x2a27e) #5 0x00007f9191c31339 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x2a339) #6 0x000056142e23e875 _start (stunnel + 0xc875) Stack trace of thread 1124119: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e250acd s_poll_sleep (stunnel + 0x1eacd) #3 0x000056142e25a21c per_second_thread (stunnel + 0x2821c) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 676190: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e241f82 client_run (stunnel + 0xff82) #3 0x000056142e2438fc client_thread (stunnel + 0x118fc) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 1124121: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e250acd s_poll_sleep (stunnel + 0x1eacd) #3 0x000056142e259fab per_day_thread (stunnel + 0x27fab) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 676445: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e241f82 client_run (stunnel + 0xff82) #3 0x000056142e2438fc client_thread (stunnel + 0x118fc) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 676300: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e241f82 client_run (stunnel + 0xff82) #3 0x000056142e2438fc client_thread (stunnel + 0x118fc) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) Stack trace of thread 676491: #0 0x00007f9191d090af __poll (libc.so.6 + 0x1020af) #1 0x000056142e2509f1 s_poll_wait (stunnel + 0x1e9f1) #2 0x000056142e241f82 client_run (stunnel + 0xff82) #3 0x000056142e2438fc client_thread (stunnel + 0x118fc) #4 0x00007f9191c97d02 start_thread (libc.so.6 + 0x90d02) #5 0x00007f9191d173ac __clone3 (libc.so.6 + 0x1103ac) ELF object binary architecture: AMD x86-64 Dec 06 04:44:02 shell systemd[1]: stunnel.service: Main process exited, code=dumped, status=6/ABRT Dec 06 04:44:02 shell systemd[1]: stunnel.service: Failed with result 'core-dump'. Dec 06 04:44:02 shell systemd[1]: stunnel.service: Consumed 2min 11.812s CPU time, 21.6M memory peak, 19.6M memory swap peak, 50.9M read from disk, 47.1M written to disk, 587.2M incoming IP traffic, 588.8M outgoing IP traffic. ``` Note that stunnel is handling mTLS for my prometheus, which means that it is indeed getting hammered by one scrape per exporter at a time, which in this case would make exactly five scrapes per minute but all of them happening at the same time, which, if this is a race, does make me a lot more likely to hit this issue. Also a huge Thank You for building what has been an integral part of my infrastructure for almost a decade now.

3 4

stunnel 5.74 released
by Michał Trojnara 13 Dec '24

13 Dec '24

Dear Users, I have released version 5.74 of stunnel. ### Version 5.74, 2024.12.13, urgency: HIGH * Bugfixes - Fixed a stapling cache deallocation crash. - Fixed "redirect" with protocol negotiation. * Features - "protocolHost" support for "socks" protocol clients. - More detailed logs in OpenSSL 3.0 or later. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 9bef235ab5d24a2a8dff6485dfd782ed235f4407e9bc8716deb383fc80cd6230 stunnel-5.74.tar.gz 8ce19cc782a64b0cacf32356249265ed16b3888e3578454853f5497726778d76 stunnel-5.74-win64-installer.exe 68c3395c1bebcc8b4eee2c7f58190aa2fe39b835dd7a4cce5ad37d5dfc1c5542 stunnel-5.74-android.zip Best regards, Mike

1 0

Stunnel on a windwos 11 pro installation not working
by ron.reijgwart＠gmail.com 09 Dec '24

09 Dec '24

I'm trying to use Stunnel on a windwos 11 pro installation. I tried version 5.56, 5.73 and 5.74b1. On my old pc all was working fine but now I get the following errors: [ ] Initializing inetd mode configuration [ ] Running on Windows 6.2 [ ] No limit detected for the number of clients [.] stunnel 5.73 on x64-pc-mingw32-gnu platform [.] Compiled/running with OpenSSL 3.3.2 3 Sep 2024 [.] Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI [ ] errno: (*_errno()) [ ] Initializing inetd mode configuration [ ] Running on Windows 6.2 [.] Reading configuration from file C:\Program Files (x86)\stunnel\config\stunnel.conf [.] UTF-8 byte order mark detected [.] FIPS mode disabled [ ] Compression disabled [ ] No PRNG seeding was required [ ] Initializing service [ssmtp] [ ] Initializing context [ssmtp] [ ] OpenSSL security level is used: 2 [ ] Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK [ ] TLSv1.3 ciphersuites: TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256 [ ] TLS options: 0x2100000 (+0x0, -0x0) [ ] Session resumption enabled [ ] Loading certificate from file: C:\Program Files (x64)\stunnel\config\stunnel.pem [!] error queue: ssl/ssl_rsa.c:472: error:0A080002:SSL routines::system lib [!] error queue: crypto/bio/bss_file.c:300: error:10080002:BIO routines::system lib [!] SSL_CTX_use_certificate_chain_file: crypto/bio/bss_file.c:297: error:80000003:system library::No such process [!] Service [ssmtp]: Failed to initialize TLS context [!] Configuration failed [ ] Deallocating temporary section defaults [ ] Cleaning up context [(null)] [ ] Deallocating section [ssmtp] [ ] Cleaning up context [ssmtp] On a windows 10 Education installation it works fine with this logging: 2024.12.05 13:38:58 LOG5[service]: Reading configuration from file C:\Program Files (x86)\stunnel\config\stunnel.conf 2024.12.05 13:38:58 LOG5[service]: UTF-8 byte order mark detected 2024.12.05 13:38:58 LOG5[service]: FIPS mode disabled 2024.12.05 13:38:58 LOG4[service]: Service [ssmtp] needs authentication to prevent MITM attacks 2024.12.05 13:38:58 LOG5[service]: Configuration successful My conf-file looks like this: ;use it for client mode client = yes [ssmtp] accept = 1925 cert = C:\Program Files (x64)\stunnel\config\stunnel.pem connect = smtp.bhosted.nl:465 Can you please give me some advice?

2 2

Is it possible for stunnel to reject client connections if the server end cannot connect?
by mohmmad170720＠gmail.com 05 Dec '24

05 Dec '24

Hi all Say we have two machines set up, ClientPC and ServerPC. On ClientPC I run stunnel accepting a connection on a local port and connecting to an stunnel port on ServerPC. On ServerPC I run stunnel accepting a connection on the local stunnel port and connecting to the 'encryption unaware' server on another port on the same ServerPC machine. OK, pretty simple stuff so far. The problem is, when I connect to ClientPC with the 'encryption unaware' client app. then I always get a successful connection, even if there is no server running on ServerPC. Of course once the client has a successful connection, it then performs a write(), and that fails with 'Connection reset by peer'. Really, since there is no server running on ServerPC, I want the connect() to stunnel on ClientPC to fail. Is there a way to do this?

1 0

Router + Cudy mesh system
by trashrap22＠gmail.com 26 Nov '24

26 Nov '24

Hi, My stunnel setup was working. I since moved and had to add a Cudy mesh system / extension to the router to extend the internet through the building. Now I can't get stunnel to work again - I have done port forwarding on the Cudy system too. Has anyone done this extentions of router setup and got stunnel to work?

1 0

Requests to cloud server that requires host header
by Lorne Kates 13 Nov '24

13 Nov '24

(related to Akamai message from before-- but I have better troubleshooting information). I'm tying to route traffic through stunnel to a "cloud" based-endpoint. That endpoint has a static server name-- test.authorize.net. (This is the dev sandbox for auth.net) But if you do an nslookup on test.authorize.net, you'll get back a different servername and IP, because it's so wonderfully "cloud". Stunnel apparently tries to connect to the nslookup value. The server rejects the request because it can't route it back to test.authorize.net. I've tried adding "delay = yes" and "sni = test.authorize.net", but neither work. To see this in action, a simple setup with any accept, then connect to test.authorize.net:443 in client = yes mode. This is what a valid response looks like (13 -- give me the darn merchant ID in a POST): https://test.authorize.net/gateway/transact.dll This is what you'll get if you try to use stunnel (400 invalid url) : https://23.195.204.150/gateway/transact.dll So how can I get stunnel to send the proper Request Header (host: test.authorize.net) make sure it's using http/1.1, etc?

4 3

Is it possible to hide "Acceptable client certificate CA names" during SSL handshaking?
by hshh 12 Nov '24

12 Nov '24

Since version 5.68, when stunnel is configured with verifyPeer=yes, CApath=/path and CAfile=/path/file, the 'Acceptable client certificate CA names' and required certificates are displayed during SSL handshaking. Is it possible to hide this information?

3 4

s_ssl_read_eof: SSL_ERROR_WANT_READ: Retrying
by stavultras＠gmail.com 07 Nov '24

07 Nov '24

Hello, i've encountered a very strange issue when you use stunnel 7.53 (doesn't matter actually, happens in 5.68 as well) like this: [server] accept = 443 protocol = socks [client] accept = 1080 protocol = socks connect = server:443 with iptables -A OUTPUT -p tcp -d 10.8.0.1 -j REDIRECT --to-ports 1080, I see in 95% cases in logs for every request from curl: curl http://10.8.0.1 (server's internal IP), however, it never happens if you use client like this: [client] accept = 1080 connect = server:443 and curl -x socks5://127.0.0.1:1080 http://10.8.0.1 (internal server's IP). Technically it affects nothing, but I still guess there's a small time overhead due to retry. Maybe i'm wrong. Please advise. Thanks.

1 0

Re: [stunnel-users] CPU 100%
by Eric Eberhard 06 Nov '24

06 Nov '24

Long ago I had a server with a bad network card. Every once in a while it would spew uncontrollable bytes onto the network. If you open a stunnel connection and it does that this could very well be the problem. If it cheap, try changing the network card. If not, you should be able to look in your firewall/router and it will tell you who is sending what bytes to whomever. See if that machine is indeed streaming the bytes in massive quantities. If not, I would suspect your stunnel is getting stuck in it's own loop. There are a million reasons this can happen (well a few less than a million) - such as maybe a bad library in the FreeBSD or a bad choice in the Makefile - such as doing threads or something in a way your O/S does not like (I use threads=fork or whatever it is, instead of actual threading). You might tinker with some of the options that make the stunnel build and try different ones. Especially if stunnel was compiled on a different version of the O/S - could be differences in bytes in things and who knows what. That is all I can suggest beyond setting the debug level to 7 (I think is highest) and then watching the log file. Eric From: stunnel-users [mailto:[email protected]] On Behalf Of Murrey, Brian J. Sent: Wednesday, October 17, 2018 10:57 AM To: stunnel-users(a)stunnel.org Subject: [stunnel-users] CPU 100% We are running stunnel 5.49 on FreeBSD 11.2 and we're running into a problem once in a while. CPU pegs at 100% when we get an stunnel connection from one of our external devices. This affects 100% of all cores and we can't even log in to console. To mitigate this temporarily, we have a script running in the background to watch when stunnel begins to spike and restarts the daemon. It doesn't happen 100% of the time, and so far I have been unable to distinguish what makes the connection do this to the CPU. Have any of you run in to this issue? Sincerely, Brian Murrey System Engineer II, IT Infrastructure _____ NOTICE: This message may contain privileged and confidential information and/or protected health information intended solely for the use of the named recipient and may be privileged or otherwise protected by law. If you are not the intended recipient of this message, you should immediately notify the sender and delete this message. Do not disseminate, reproduce, or review this message or attachments if you are not the intended recipient. The sender or others may have legal rights restricting the dissemination of the information contained in this message and, as a result, remedies against you in the event of the improper dissemination of confidential information, trade secrets, personal information or privileged communications. This message is the work of the sender and does not necessarily reflect the position, views, or policies of TriMedx LLC or its affiliates. WARNING: The integrity and security of this message cannot be guaranteed and may contain or transmit a virus or other illicit code. Neither TriMedx LLC or its affiliates accept liability for any damage attributable to viruses or illicit code transmitted through this message or an attachment.

2 1

socks mode doesn't verify peer
by stavultras＠gmail.com 05 Nov '24

05 Nov '24

Hello. I'm trying to configure "protocol = socks" with "redirect = 127.0.0.1:80" and "verifyPeer = yes", but accordingly to the debug logs stunnel doesn't verify peer when I'm trying to connect without client's certificate, for an example, from browser: https://192.168.200.131:9013/, where 192.168.200.131 is stunnel server. Config file: [socks] cert = /usr/local/etc/stunnel/server.pem CAfile = /usr/local/etc/stunnel/client.crt verifyPeer = yes redirect = 127.0.0.1:80 accept = 0.0.0.0:9013 protocol = socks Debug log: 2024.10.02 07:24:19 LOG6[9]: No peer certificate received 2024.10.02 07:24:19 LOG6[9]: Session id: AFA5F9CE2997328612F76E3B3572FE00C71C53ED31A98567E56DCC084EF580AD 2024.10.02 07:24:19 LOG7[9]: TLS state (accept): SSLv3/TLS write session ticket 2024.10.02 07:24:19 LOG6[9]: TLS accepted: new session negotiated 2024.10.02 07:24:19 LOG6[9]: TLSv1.3 ciphersuite: TLS_AES_128_GCM_SHA256 (128-bit encryption) 2024.10.02 07:24:19 LOG6[9]: Peer temporary key: X25519, 253 bits 2024.10.02 07:24:19 LOG7[9]: Compression: null, expansion: null 2024.10.02 07:24:19 LOG7[9]: Waiting for the SOCKS request 2024.10.02 07:24:19 LOG3[9]: Unsupported SOCKS version 0x47 2024.10.02 07:24:19 LOG5[9]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket It tries to accept SOCKS info even without certificate and doesn't redirect to 127.0.0.1:80. In browser, I'm getting: Secure Connection Failed An error occurred during a connection to 192.168.200.131:9013. PR_CONNECT_RESET_ERROR Error code: PR_CONNECT_RESET_ERROR Can you check why it happens? Thank you.

1 9

"direct" protocol support
by stavultras＠gmail.com 05 Nov '24

05 Nov '24

Hello, is it possible to implement "direct" protocol support? For an example: You have OpenVPN TCP on a server and let's say SSH (or any other TCP software) and you want to use stunnel on the same port or under the same SNI. Configs would like: [server] accept = 443 protocol = direct [client_openvpn_tcp] sni=test.com protocolHost = 127.0.0.1:2000 connect = server:443 accept = 127.0.0.1:2000 [client_ssh] sni=test.com protocolHost = 127.0.0.1:22 connect = server:443 accept = 127.0.0.1:222 I know, you can use "protocol = socks", but in this case you can't use this thing directly with your software that doesn't support socks5 (OpenVPN isn't a fully good example, because it supports socks5 proxy). SSH is a good example if you want to use it under TLS on the same port with OpenVPN TCP and other TCP applications. It will be useful for many other applications without socks5 support and if you won't occupy more than 1 port or SNI. P.S.: I'm still trying to use socks5 code from stunnel to implement "direct" protocol, but i'm not very good at C. Thanks.

1 2

Smpp with stunnel
by Andrew Z 16 Oct '24

16 Oct '24

Hello, I'm trying to leverage stunnel with smpp to communicate over by smppS protocol. I saw an older message from Pierre Delaage (2019) outlining the process ( https://www.stunnel.org/pipermail/stunnel-users/2010-September/002752.html) Unfortunately, that is not working for me. What may I be overlooking? Data: Fedora 39, stunnel 5.72 on x86_64-redhat-linux-gnu platform stunnel config from /etc/stunnel: cat ./stunnel.conf output = /var/log/stunnel.log foreground = yes [smpps] client = yes accept = 3775 connect = <vendor dnsname>:3550 cert = /tmp/nginx-selfsigned.crt key=/tmp/nginx-selfsigned.key sslVersion=all [root@dell5000 stunnel]# stunnel ./stunnel.conf 2024.10.16 13:52:44 LOG5[ui]: stunnel 5.72 on x86_64-redhat-linux-gnu platform 2024.10.16 13:52:44 LOG5[ui]: Compiled with OpenSSL 3.1.1 30 May 2023 2024.10.16 13:52:44 LOG5[ui]: Running with OpenSSL 3.1.4 24 Oct 2023 2024.10.16 13:52:44 LOG5[ui]: Threading:PTHREAD Sockets:POLL,IPv6,SYSTEMD TLS:ENGINE,FIPS,OCSP,PSK,SNI 2024.10.16 13:52:44 LOG5[ui]: Reading configuration from file /etc/stunnel/stunnel.conf 2024.10.16 13:52:44 LOG5[ui]: UTF-8 byte order mark not detected 2024.10.16 13:52:44 LOG5[ui]: FIPS mode disabled 2024.10.16 13:52:44 LOG4[ui]: Service [smpps] needs authentication to prevent MITM attacks 2024.10.16 13:52:44 LOG5[ui]: Configuration successful 2024.10.16 13:53:02 LOG5[0]: Service [smpps] accepted connection from 192.168.1.114:11270 2024.10.16 13:53:02 LOG5[0]: s_connect: connected <vendor IP>:3550 2024.10.16 13:53:02 LOG5[0]: Service [smpps] connected remote server from 192.168.1.114:55508 2024.10.16 13:53:07 LOG5[0]: Connection closed: 293 byte(s) sent to TLS, 0 byte(s) sent to socket the smpp client is pointed to localhost:3775 and I running in the container. As such the "localhost" is "host.containers.internal". Here is the smpp log: 2024-10-16 17:53:02 INFO 1 Establishing SSL connection to host.containers.internal:3775 2024-10-16 17:53:02 INFO 1 Connecting to IPv4Address(type='TCP', host='host.containers.internal', port=3775) ... 2024-10-16 17:53:02 WARNING 1 SMPP connection established from 192.168.1.114 to port 40554 2024-10-16 17:53:02 INFO 1 Connection made to host.containers.internal:3775 2024-10-16 17:53:02 WARNING 1 Requesting bind as transceiver 2024-10-16 17:53:07 WARNING 1 SMPP 192.168.1.114 disconnected from port 40554: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion: Connection lost. ] 2024-10-16 17:53:07 ERROR 1 Connection lost. Reason: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly. ] 2024-10-16 17:53:07 INFO 1 Reconnecting after 10 seconds ... 2024-10-16 17:53:17 INFO 1 Connecting to IPv4Address(type='TCP', host='host.containers.internal', port=3775) ... 2024-10-16 17:53:17 WARNING 1 SMPP connection established from 192.168.1.114 to port 54806 2024-10-16 17:53:17 INFO 1 Connection made to host.containers.internal:3775 2024-10-16 17:53:17 WARNING 1 Requesting bind as transceiver 2024-10-16 17:53:22 WARNING 1 SMPP 192.168.1.114 disconnected from port 54806: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion: Connection lost. ] 2024-10-16 17:53:22 ERROR 1 Connection lost. Reason: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionDone'>: Connection was closed cleanly. ] 2024-10-16 17:53:22 INFO 1 Reconnecting after 10 seconds ... 2024-10-16 17:53:32 ERROR 1 Request timed out after 30 secs: PDU [command: CommandId.bind_transceiver, sequence_number: 1, command_status: CommandStatus.ESME_ROK system_id: b'XXXXX' password: b'XXXXX' system_type: b'' interface_version: 52 addr_ton: <AddrTon.UNKNOWN: 1> addr_npi: <AddrNpi.UNKNOWN: 1> address_range: None ] 2024-10-16 17:53:32 ERROR 1 Bind failed [[Failure instance: Traceback (failure with no frames): <class 'smpp.pdu.error.SMPPRequestTimoutError'>: Request timed out after 30 secs: PDU [command: CommandId.bind_transceiver, sequence_number: 1, command_status: CommandStatus.ESME_ROK system_id: b'XXXX' password: b'XXXXX' system_type: b'' interface_version: 52 addr_ton: <AddrTon.UNKNOWN: 1> addr_npi: <AddrNpi.UNKNOWN: 1> address_range: None ] ]]. Disconnecting...

1 0

stunnel overhead: Tunneling over stunnel - How does this affect MTU?
by Marek Küthe 15 Oct '24

15 Oct '24

Hello, I am tunneling packets via stunnel using OpenVPN. I would now like to have an MTU in my tunnel where no fragmentation occurs. Hence my question: What overhead does stunnel introduce? Is the plaintext with a length one-to-one translated into the ciphertext? How large is the stunnel / TLS header? I look forward to any answer! Regards Marek Küthe -- Marek Küthe m.k(a)mk16.de er/ihm he/him

1 0

Newbie: installation and config
by ajbguinto＠yahoo.com 30 Sep '24

30 Sep '24

Hi, I am tasked to make stunnel work in our organization but a newbie I seem not to be able to follow the instructions for installation. can you help me out? plan to install this on our servers that will cater to oracle / mssql in transit data encryption. how do I know if im installing on a client or a server? will this work standalone (server will act as server and client too). how will this be configured.

2 5

External PSK and TLS 1.3
by mike ads 18 Sep '24

18 Sep '24

Hello, I'm looking for a solution to connect to a server using TLS 1.3 and an external PSK. Does stunnel support this? I see that there are configuration options to set TLS 1.3, and configuration options to specify a PSK; if those were used together, would that result in TLS 1.3 with the PSK? If so, how would I choose between ephemeral vs non-ephemeral DH? This doesn't seem to be an option. Ephemeral is an important choice for forward secrecy. Would it default to ephemeral? Thank you.

1 0

stunnel 5.73 released
by Michał Trojnara 09 Sep '24

09 Sep '24

Dear Users, I have released version 5.73 of stunnel. ### Version 5.73, 2024.09.09, urgency: MEDIUM * Security bugfixes - OpenSSL DLLs updated to version 3.3.2. - OpenSSL FIPS Provider updated to version 3.0.9. * Bugfixes - Fixed a memory leak while reloading stunnel.conf sections with "client=yes" and "delay=no". - Fixed TIMEOUTocsp with values greater than 4. - Fix the IPv6 test on a non-IPv6 machine. * Features - HELO replaced with EHLO in the post-STARTTLS SMTP protocol negotiation (thx to Peter Pentchev). - OCSP stapling fetches moved away from server threads. - Improved client-side session resumption. - Added support for the mimalloc allocator. - Check for protocolHost moved to configuration file processing for the client-side CONNECT protocol. - Clarified some confusing OpenSSL's certificate verification error messages. - stunnel.nsi updated for Debian 13 and Fedora. - Improved NetBSD compatibility. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: bc917c3bcd943a4d632360c067977a31e85e385f5f4845f69749bce88183cb38 stunnel-5.73.tar.gz d686b1a4135947718e7a8157a8cb6694ed50e2267713de1972941148a8859789 stunnel-5.73-win64-installer.exe 9d6065ea1e7fa59405b5a152eeeaed9296bd5a0d2b11964800e95867e7391f16 stunnel-5.73-android.zip Best regards, Mike

1 0

Re: GMail and OAuth 2.0
by meirman＠fastmail.com 02 Sep '24

02 Sep '24

I would prefer to use stunnel, which I used for 10 or 20 years until recently, but this proxy is supposed to work for the new problem: SIMON ROB'S EMAIL-OAUTH2-PROXY Go to https://github.com/simonrob/email-oauth2-proxy/releases Download emailproxy-YYYY-MM-DD_pyinstaller-Windows.zip from the most recent release. Unzip the emailproxy-YYYY-MM-DD_pyinstaller-Windows.zip file, extracting the contents to the desired location; avoid the protected system folders such as "Program Files", "Program Files (x86)", etc. Right-click each extracted file, go to Properties, and enable "Unblock"..... Write me at traveler(a)mm.st if you want me to post the rest of the instructions. Maybe experienced people don't need them. I havent' tried to install either this or stunnel yet.

1 0

No key from stunnel TLS handshake ?
by atritium＠hushmail.com 31 Aug '24

31 Aug '24

In a TLS handshake, the server presents the signed public key (certificate from a CA) to the client to use so that it doesn't have to be pre-existing in a file on the arbitrary systems making connections. Am I correct that stunnel does NOT do this? It appears stunnel clients MUST have a pre-existing -file- containing the server's signed public key and pointed at in the config file's CAfile setting. Sort of like "authorized_keys" file for ssh, except the certificates have short lifespans before going invalid. This makes authentication unworkable for services that could have thousands of semi-random people connecting, especially with certificate lifespans creeping down to 1 year and probably months. Even if the certificate was bundled in the initial stunnel set-up, remote clients would have to constantly be updating the file. If this is correct, I wonder why stunnel doesn't handle the TLS handshake like a browser and supply the current server public certificate for the client to authenticate. It seems like stunnel is presupposing a handful of clients in close contact who can be constantly fed current certificates to place in files on their machine. Really limits usability of the tool. Or maybe I am missing something (?)

4 3

Peer suddenly disconnected
by noel.melvin＠tcs.com 20 Aug '24

20 Aug '24

We are seeing these messages after the stunnel application was closed and opened. LOG3[81]: SSL_accept: Peer suddenly disconnected Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket What could be the issue.

1 0

Re: stunnel 5.71 released
by Daniel Moerker 14 Aug '24

14 Aug '24

Dear Michal We are running Stunnel version 5.72 as TLS proxy for internal API in server mode on Windows. The server has no direct internet access. [my_tls_proxy] sslVersionMin = TLSv1.2 accept = 8443 connect = 1234 cert = mycert.pem OCSPaia = no OCSPrequire = no Is there a way to disable the OCSP connection attempts? The log is full of: 2024.08.14 16:20:26 LOG5[32]: OCSP: Connecting the AIA responder " http://ocsp.globalsign.com/gsrsaovsslca2018" 2024.08.14 16:20:27 LOG3[28]: s_connect: connect 104.18.21.226:80: Connection refused (WSAECONNREFUSED) (10061) Many thanks in advance for your reply. BR, Daniel

1 0

stunnel reload - existing connections
by Stewart Anderson 13 Aug '24

13 Aug '24

> >Hi All, I have seen this question asked a few times, but no replies that I could see. I have my stunnel services set in different service (.conf ) files and when I reload the config they all load fine. What does stunnel do with the existing connections? i.e. when I add a new service config and then do a reload, are the existing connections explicitly dropped and reloaded or can they by dynamically updated without interrupting the connection? For me, this specifically is when I add a new service on a new port, no changes to existing services. cheers Stu >

1 1

Problems with stunnel segfaulting on every connection
by jml＠bigjar.com 12 Aug '24

12 Aug '24

Hello, I’m running into a problem with stunnel segfaulting on me. I’m not sure if it’s a NetBSD problem or an stunnel problem. The following combinations work: NetBSD-10.0/stunnel 5.57 Debian/stunnel 5.50 Fedora/stunnel 5.72 Unfortunately, what doesn’t work for me is: NetBSD-10.0/stunnel 5.71 (or 5.7.2) NetBSD-9.x/stunnel 5.71 It looks like stunnel is doing something related to OCSP and the response causes it to crash. The certificate is a wildcard for my domain, bigjar.com. Here’s a snippet of the output right before the segfault: 2024.08.04 13:47:35 LOG7[0]: SNI: no virtual services defined 2024.08.04 13:47:35 LOG7[0]: OCSP stapling: Server callback called 2024.08.04 13:47:35 LOG6[0]: OCSP: The root CA certificate was not found 2024.08.04 13:47:35 LOG5[0]: OCSP: Connecting the AIA responder "http://e5.o.lencr.org" Segmentation fault (core dumped) I rolled back to an earlier certificate issued by sectigo and got the same result: 2024.08.05 15:11:01 LOG7[0]: OCSP stapling: Server callback called 2024.08.05 15:11:01 LOG5[0]: OCSP: Connecting the AIA responder "http://ocsp.sectigo.com" There were some issues getting stunnel to run with the correct version of OpenSSL (the “pkgsrc” version), but those have been fixed. Any suggestions are greatly appreciated! Thanks, Jason M. Full /usr/pkg/etc/stunnel/stunnel.conf —————————————————— foreground = yes debug = 7 CAPath = /etc/openssl/certs [imaps] accept = 993 connect = 10.100.0.75:143 cert = /path/wildcard.bigjar.com.pem OCSPaia = no Full stunnel output: 2024.08.05 15:22:13 LOG6[ui]: Initializing inetd mode configuration 2024.08.05 15:22:13 LOG7[ui]: Clients allowed=500 2024.08.05 15:22:13 LOG5[ui]: stunnel 5.71 on x86_64--netbsd platform 2024.08.05 15:22:13 LOG5[ui]: Compiled/running with OpenSSL 3.3.1 4 Jun 2024 2024.08.05 15:22:13 LOG5[ui]: Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,OCSP,PSK,SNI Auth:LIBWRAP 2024.08.05 15:22:13 LOG7[ui]: errno: (*__errno()) 2024.08.05 15:22:13 LOG6[ui]: Initializing inetd mode configuration 2024.08.05 15:22:13 LOG5[ui]: Reading configuration from file /usr/pkg/etc/stunnel/stunnel.conf 2024.08.05 15:22:13 LOG5[ui]: UTF-8 byte order mark not detected 2024.08.05 15:22:13 LOG6[ui]: Compression disabled 2024.08.05 15:22:13 LOG7[ui]: No PRNG seeding was required 2024.08.05 15:22:13 LOG6[ui]: Initializing service [imaps] 2024.08.05 15:22:13 LOG7[ui]: Initializing context [imaps] 2024.08.05 15:22:13 LOG6[ui]: OpenSSL security level is used: 2 2024.08.05 15:22:13 LOG7[ui]: Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK 2024.08.05 15:22:13 LOG7[ui]: TLSv1.3 ciphersuites: TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256 2024.08.05 15:22:13 LOG7[ui]: TLS options: 0x2100000 (+0x0, -0x0) 2024.08.05 15:22:13 LOG6[ui]: Session resumption enabled 2024.08.05 15:22:13 LOG6[ui]: Loading certificate from file: /usr/local/certs/wildcard.bigjar.com.20210406.pem 2024.08.05 15:22:13 LOG6[ui]: Certificate loaded from file: /usr/local/certs/wildcard.bigjar.com.20210406.pem 2024.08.05 15:22:13 LOG6[ui]: Loading private key from file: /usr/local/certs/wildcard.bigjar.com.20210406.pem 2024.08.05 15:22:13 LOG6[ui]: Private key loaded from file: /usr/local/certs/wildcard.bigjar.com.20210406.pem 2024.08.05 15:22:13 LOG7[ui]: Private key check succeeded 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: CN=ACCVRAIZ1, OU=PKIACCV, O=ACCV, C=ES 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=ES, O=FNMT-RCM, OU=AC RAIZ FNMT-RCM 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=ES, O=FNMT-RCM, OU=Ceres, organizationIdentifier=VATES-Q2826004J, CN=AC RAIZ FNMT-RCM SERVIDORES SEGUROS 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: serialNumber=G63287510, C=ES, O=ANF Autoridad de Certificacion, OU=ANF CA Raiz, CN=ANF Secure Server Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=IT, L=Milan, O=Actalis S.p.A./03358520967, CN=Actalis Authentication Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=AffirmTrust, CN=AffirmTrust Commercial 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=AffirmTrust, CN=AffirmTrust Networking 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=AffirmTrust, CN=AffirmTrust Premium 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=AffirmTrust, CN=AffirmTrust Premium ECC 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Amazon, CN=Amazon Root CA 1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Amazon, CN=Amazon Root CA 2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Amazon, CN=Amazon Root CA 3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Amazon, CN=Amazon Root CA 4 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: CN=Atos TrustedRoot 2011, O=Atos, C=DE 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: CN=Atos TrustedRoot Root CA ECC TLS 2021, O=Atos, C=DE 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: CN=Atos TrustedRoot Root CA RSA TLS 2021, O=Atos, C=DE 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=ES, CN=Autoridad de Certificacion Firmaprofesional CIF A62634068 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O=BEIJING CERTIFICATE AUTHORITY, CN=BJCA Global Root CA1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O=BEIJING CERTIFICATE AUTHORITY, CN=BJCA Global Root CA2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=IE, O=Baltimore, OU=CyberTrust, CN=Baltimore CyberTrust Root 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=NO, O=Buypass AS-983163327, CN=Buypass Class 2 Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=NO, O=Buypass AS-983163327, CN=Buypass Class 3 Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=SK, L=Bratislava, O=Disig a.s., CN=CA Disig Root R2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O=China Financial Certification Authority, CN=CFCA EV ROOT 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO ECC Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Certainly, CN=Certainly Root E1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Certainly, CN=Certainly Root R1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=FR, O=Dhimyotis, CN=Certigna 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=FR, O=Dhimyotis, OU=0002 48146308100036, CN=Certigna Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=PL, O=Asseco Data Systems S.A., OU=Certum Certification Authority, CN=Certum EC-384 CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=PL, O=Unizeto Technologies S.A., OU=Certum Certification Authority, CN=Certum Trusted Network CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=PL, O=Unizeto Technologies S.A., OU=Certum Certification Authority, CN=Certum Trusted Network CA 2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=PL, O=Asseco Data Systems S.A., OU=Certum Certification Authority, CN=Certum Trusted Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=CommScope, CN=CommScope Public Trust ECC Root-01 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=CommScope, CN=CommScope Public Trust ECC Root-02 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=CommScope, CN=CommScope Public Trust RSA Root-01 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=CommScope, CN=CommScope Public Trust RSA Root-02 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=D-Trust GmbH, CN=D-TRUST BR Root CA 1 2020 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=D-Trust GmbH, CN=D-TRUST EV Root CA 1 2020 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=D-Trust GmbH, CN=D-TRUST Root Class 3 CA 2 2009 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=D-Trust GmbH, CN=D-TRUST Root Class 3 CA 2 EV 2009 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Google Trust Services LLC, CN=GTS Root R1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="DigiCert, Inc.", CN=DigiCert TLS ECC P384 Root G5 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="DigiCert, Inc.", CN=DigiCert TLS RSA4096 Root G5 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Trusted Root G4 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: O=Entrust.net, OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.net Certification Authority (2048) 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="Entrust, Inc.", OU=www.entrust.net/CPS is incorporated by reference, OU="(c) 2006 Entrust, Inc.", CN=Entrust Root Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2012 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - EC1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2009 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2015 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G4 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O="GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.", CN=GDCA TrustAUTH R5 ROOT 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Google Trust Services LLC, CN=GTS Root R2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=AT, O=e-commerce monitoring GmbH, CN=GLOBALTRUST 2020 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Google Trust Services LLC, CN=GTS Root R3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Google Trust Services LLC, CN=GTS Root R4 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: OU=GlobalSign ECC Root CA - R4, O=GlobalSign, CN=GlobalSign 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: OU=GlobalSign ECC Root CA - R5, O=GlobalSign, CN=GlobalSign 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BE, O=GlobalSign nv-sa, OU=Root CA, CN=GlobalSign Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: OU=GlobalSign Root CA - R3, O=GlobalSign, CN=GlobalSign 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: OU=GlobalSign Root CA - R6, O=GlobalSign, CN=GlobalSign 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Root E46 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BE, O=GlobalSign nv-sa, CN=GlobalSign Root R46 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="The Go Daddy Group, Inc.", OU=Go Daddy Class 2 Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Arizona, L=Scottsdale, O="GoDaddy.com, Inc.", CN=Go Daddy Root Certificate Authority - G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GR, O=Hellenic Academic and Research Institutions CA, CN=HARICA TLS ECC Root CA 2021 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GR, O=Hellenic Academic and Research Institutions CA, CN=HARICA TLS RSA Root CA 2021 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GR, L=Athens, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions ECC RootCA 2015 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GR, L=Athens, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions RootCA 2015 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=TW, O="Chunghwa Telecom Co., Ltd.", CN=HiPKI Root CA - G1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=HK, ST=Hong Kong, L=Hong Kong, O=Hongkong Post, CN=Hongkong Post Root CA 3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Internet Security Research Group, CN=ISRG Root X1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Internet Security Research Group, CN=ISRG Root X2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=IdenTrust, CN=IdenTrust Commercial Root CA 1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=IdenTrust, CN=IdenTrust Public Sector Root CA 1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=ES, O=IZENPE S.A., CN=Izenpe.com 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=HU, L=Budapest, O=Microsec Ltd., CN=Microsec e-Szigno Root CA 2009, emailAddress=info(a)e-szigno.hu 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Microsoft Corporation, CN=Microsoft ECC Root Certificate Authority 2017 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=PL, O=Krajowa Izba Rozliczeniowa S.A., CN=SZAFIR ROOT CA2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=Microsoft Corporation, CN=Microsoft RSA Root Certificate Authority 2017 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=KR, O=NAVER BUSINESS PLATFORM Corp., CN=NAVER Global Root Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=HU, L=Budapest, O=NetLock Kft., OU=Tanúsítványkiadók (Certification Services), CN=NetLock Arany (Class Gold) Főtanúsítvány 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CH, O=WISeKey, OU=OISTE Foundation Endorsed, CN=OISTE WISeKey Global Root GB CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CH, O=WISeKey, OU=OISTE Foundation Endorsed, CN=OISTE WISeKey Global Root GC CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 1 G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 2 G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=BM, O=QuoVadis Limited, CN=QuoVadis Root CA 3 G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Texas, L=Houston, O=SSL Corporation, CN=SSL.com EV Root Certification Authority ECC 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=JP, O="Japan Certification Services, Inc.", CN=SecureSign RootCA11 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Texas, L=Houston, O=SSL Corporation, CN=SSL.com EV Root Certification Authority RSA R2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Texas, L=Houston, O=SSL Corporation, CN=SSL.com Root Certification Authority ECC 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Texas, L=Houston, O=SSL Corporation, CN=SSL.com Root Certification Authority RSA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=SSL Corporation, CN=SSL.com TLS ECC Root CA 2022 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=SSL Corporation, CN=SSL.com TLS RSA Root CA 2022 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication Root E46 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication Root R46 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=SecureTrust Corporation, CN=SecureTrust CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O=SecureTrust Corporation, CN=Secure Global CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=JP, O="SECOM Trust Systems CO.,LTD.", CN=Security Communication ECC RootCA1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=JP, O="SECOM Trust Systems CO.,LTD.", OU=Security Communication RootCA2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=JP, O="SECOM Trust Systems CO.,LTD.", CN=Security Communication RootCA3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, O="Starfield Technologies, Inc.", OU=Starfield Class 2 Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", CN=Starfield Root Certificate Authority - G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", CN=Starfield Services Root Certificate Authority - G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CH, O=SwissSign AG, CN=SwissSign Gold CA - G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CH, O=SwissSign AG, CN=SwissSign Silver CA - G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=T-Systems Enterprise Services GmbH, OU=T-Systems Trust Center, CN=T-TeleSec GlobalRoot Class 2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=T-Systems Enterprise Services GmbH, OU=T-Systems Trust Center, CN=T-TeleSec GlobalRoot Class 3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=TW, O=TAIWAN-CA, OU=Root CA, CN=TWCA Global Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=TW, O=TAIWAN-CA, OU=Root CA, CN=TWCA Root Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=Deutsche Telekom Security GmbH, CN=Telekom Security TLS ECC Root 2020 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=DE, O=Deutsche Telekom Security GmbH, CN=Telekom Security TLS RSA Root 2023 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: O=TeliaSonera, CN=TeliaSonera Root CA v1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=FI, O=Telia Finland Oyj, CN=Telia Root CA v2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O="TrustAsia Technologies, Inc.", CN=TrustAsia Global Root CA G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O="TrustAsia Technologies, Inc.", CN=TrustAsia Global Root CA G4 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Illinois, L=Chicago, O="Trustwave Holdings, Inc.", CN=Trustwave Global Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Illinois, L=Chicago, O="Trustwave Holdings, Inc.", CN=Trustwave Global ECC P256 Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=Illinois, L=Chicago, O="Trustwave Holdings, Inc.", CN=Trustwave Global ECC P384 Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=TN, O=Agence Nationale de Certification Electronique, CN=TunTrust Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O=UniTrust, CN=UCA Extended Validation Root 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O=UniTrust, CN=UCA Global G2 Root 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust ECC Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, OU=www.xrampsecurity.com, O=XRamp Security Services Inc, CN=XRamp Global Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=RO, O=certSIGN, OU=certSIGN ROOT CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=RO, O=CERTSIGN SA, OU=certSIGN ROOT CA G2 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=HU, L=Budapest, O=Microsec Ltd., organizationIdentifier=VATHU-23584497, CN=e-Szigno Root CA 2017 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=TW, O="Chunghwa Telecom Co., Ltd.", OU=ePKI Root Certification Authority 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, OU=emSign PKI, O=eMudhra Inc, CN=emSign ECC Root CA - C3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=IN, OU=emSign PKI, O=eMudhra Technologies Limited, CN=emSign ECC Root CA - G3 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=US, OU=emSign PKI, O=eMudhra Inc, CN=emSign Root CA - C1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=IN, OU=emSign PKI, O=eMudhra Technologies Limited, CN=emSign Root CA - G1 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O="iTrusChina Co.,Ltd.", CN=vTrus ECC Root CA 2024.08.05 15:22:13 LOG6[ui]: Configured trusted client CA: C=CN, O="iTrusChina Co.,Ltd.", CN=vTrus Root CA 2024.08.05 15:22:13 LOG7[ui]: OCSP: Server OCSP stapling enabled 2024.08.05 15:22:13 LOG6[ui]: DH initialization skipped: no DH ciphersuites 2024.08.05 15:22:13 LOG7[ui]: ECDH initialization 2024.08.05 15:22:13 LOG7[ui]: ECDH initialized with curves X25519:P-256:X448:P-521:P-384 2024.08.05 15:22:13 LOG5[ui]: Configuration successful 2024.08.05 15:22:13 LOG7[ui]: Deallocating deployed section defaults 2024.08.05 15:22:13 LOG7[ui]: Cleaning up context [stunnel] 2024.08.05 15:22:13 LOG7[ui]: Binding service [imaps] 2024.08.05 15:22:13 LOG7[ui]: Listening file descriptor created (FD=9) 2024.08.05 15:22:13 LOG7[ui]: Setting accept socket options (FD=9) 2024.08.05 15:22:13 LOG7[ui]: Option SO_REUSEADDR set on accept socket 2024.08.05 15:22:13 LOG6[ui]: Service [imaps] (FD=9) bound to :::993 2024.08.05 15:22:13 LOG7[ui]: Listening file descriptor created (FD=10) 2024.08.05 15:22:13 LOG7[ui]: Setting accept socket options (FD=10) 2024.08.05 15:22:13 LOG7[ui]: Option SO_REUSEADDR set on accept socket 2024.08.05 15:22:13 LOG6[ui]: Service [imaps] (FD=10) bound to 0.0.0.0:993 2024.08.05 15:22:13 LOG7[ui]: No pid file being created 2024.08.05 15:22:13 LOG6[ui]: Accepting new connections 2024.08.05 15:22:13 LOG7[per-second]: Per-second thread initialized 2024.08.05 15:22:13 LOG7[per-day]: Per-day thread initialized 2024.08.05 15:22:13 LOG6[per-day]: Executing per-day jobs 2024.08.05 15:22:13 LOG6[per-day]: Per-day jobs completed in 0 seconds 2024.08.05 15:22:13 LOG7[per-day]: Waiting 86400 seconds 2024.08.05 15:22:34 LOG7[ui]: Found 1 ready file descriptor(s) 2024.08.05 15:22:34 LOG7[ui]: FD=4 events=0x1 revents=0x0 2024.08.05 15:22:34 LOG7[ui]: FD=9 events=0x1 revents=0x0 2024.08.05 15:22:34 LOG7[ui]: FD=10 events=0x1 revents=0x1 2024.08.05 15:22:34 LOG7[ui]: Service [imaps] accepted (FD=3) from 192.168.10.127:50130 2024.08.05 15:22:34 LOG7[0]: Service [imaps] started 2024.08.05 15:22:34 LOG7[0]: Setting local socket options (FD=3) 2024.08.05 15:22:34 LOG7[0]: Option TCP_NODELAY set on local socket 2024.08.05 15:22:34 LOG5[0]: Service [imaps] accepted connection from 192.168.10.127:50130 2024.08.05 15:22:34 LOG6[0]: Peer certificate not required 2024.08.05 15:22:34 LOG7[0]: TLS state (accept): before SSL initialization 2024.08.05 15:22:34 LOG7[0]: TLS state (accept): before SSL initialization 2024.08.05 15:22:34 LOG7[0]: Initializing application specific data for session authenticated 2024.08.05 15:22:34 LOG7[0]: SNI: no virtual services defined 2024.08.05 15:22:34 LOG7[0]: OCSP stapling: Server callback called 2024.08.05 15:22:34 LOG5[0]: OCSP: Connecting the AIA responder "http://ocsp.sectigo.com" Segmentation fault (core dumped) uname -a from the clean NetBSD 10.0 install ——————————————————————— NetBSD Thundercats.virtual.bigjar.com 10.0 NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024 [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC amd64 dmesg from the same system ——————————— [ 1.000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, [ 1.000000] 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, [ 1.000000] 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, [ 1.000000] 2024 [ 1.000000] The NetBSD Foundation, Inc. All rights reserved. [ 1.000000] Copyright (c) 1982, 1986, 1989, 1991, 1993 [ 1.000000] The Regents of the University of California. All rights reserved. [ 1.000000] NetBSD 10.0 (GENERIC) #0: Thu Mar 28 08:33:33 UTC 2024 [ 1.000000] [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC [ 1.000000] total memory = 2047 MB [ 1.000000] avail memory = 1953 MB [ 1.000000] timecounter: Timecounters tick every 10.000 msec [ 1.000000] Kernelized RAIDframe activated [ 1.000000] timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100 [ 1.000004] mainbus0 (root) [ 1.000004] ACPI: RSDP 0x00000000000F5220 000014 (v00 BOCHS ) [ 1.000004] ACPI: RSDT 0x000000007FFE3036 000038 (v01 BOCHS BXPC 00000001 BXPC 00 [ 1.000004] ACPI: FACP 0x000000007FFE2E08 000074 (v01 BOCHS BXPC 00000001 BXPC 00 [ 1.000004] ACPI: DSDT 0x000000007FFDF040 003DC8 (v01 BOCHS BXPC 00000001 BXPC 0 [ 1.000004] ACPI: FACS 0x000000007FFDF000 000040 [ 1.000004] ACPI: APIC 0x000000007FFE2E7C 000090 (v03 BOCHS BXPC 00000001 BXPC 00 [ 1.000004] ACPI: SSDT 0x000000007FFE2F0C 0000CA (v01 BOCHS VMGENID 00000001 BXPC [ 1.000004] ACPI: HPET 0x000000007FFE2FD6 000038 (v01 BOCHS BXPC 00000001 BXPC 00 [ 1.000004] ACPI: WAET 0x000000007FFE300E 000028 (v01 BOCHS BXPC 00000001 BXPC 00 [ 1.000004] ACPI: 2 ACPI AML tables successfully acquired and loaded [ 1.000004] ioapic0 at mainbus0 apid 0: pa 0xfec00000, version 0x11, 24 pins [ 1.000004] cpu0 at mainbus0 apid 0 [ 1.000004] cpu0: Use lfence to serialize rdtsc [ 1.000004] cpu0: Intel(R) Xeon(R) CPU L5420 @ 2.50GHz, id 0x1067a [ 1.000004] cpu0: node 0, package 0, core 0, smt 0 [ 1.000004] cpu1 at mainbus0 apid 1 [ 1.000004] cpu1: Intel(R) Xeon(R) CPU L5420 @ 2.50GHz, id 0x1067a [ 1.000004] cpu1: node 0, package 0, core 1, smt 0 [ 1.000004] cpu2 at mainbus0 apid 2 [ 1.000004] cpu2: Intel(R) Xeon(R) CPU L5420 @ 2.50GHz, id 0x1067a [ 1.000004] cpu2: node 0, package 1, core 0, smt 0 [ 1.000004] cpu3 at mainbus0 apid 3 [ 1.000004] cpu3: Intel(R) Xeon(R) CPU L5420 @ 2.50GHz, id 0x1067a [ 1.000004] cpu3: node 0, package 1, core 1, smt 0 [ 1.000004] acpi0 at mainbus0: Intel ACPICA 20221020 [ 1.000004] acpi0: X/RSDT: OemId <BOCHS ,BXPC ,00000001>, AslId <BXPC,00000001> [ 1.000004] LNKS: ACPI: Found matching pin for 0.1.INTA at func 3: 9 [ 1.000004] LNKD: ACPI: Found matching pin for 0.1.INTD at func 2: 11 [ 1.000004] LNKC: ACPI: Found matching pin for 0.3.INTA at func 0: 11 [ 1.000004] LNKA: ACPI: Found matching pin for 0.5.INTA at func 0: 10 [ 1.000004] LNKB: ACPI: Found matching pin for 0.18.INTA at func 0: 10 [ 1.000004] LNKB: ACPI: Found matching pin for 0.30.INTA at func 0: 10 [ 1.000004] LNKC: ACPI: Found matching pin for 0.31.INTA at func 0: 11 [ 1.000004] acpi0: SCI interrupting at int 9 [ 1.000004] acpi0: fixed power button present [ 1.000004] timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000 [ 1.026231] hpet0 at acpi0: high precision event timer (mem 0xfed00000-0xfed00400) [ 1.026231] timecounter: Timecounter "hpet0" frequency 100000000 Hz quality 2000 [ 1.029336] qemufwcfg0 at acpi0 (FWCF, QEMU0002): io 0x510-0x51b [ 1.029336] qemufwcfg0: <QEMU> [ 1.029336] pckbc1 at acpi0 (KBD, PNP0303) (kbd port): io 0x60,0x64 irq 1 [ 1.029336] pckbc2 at acpi0 (MOU, PNP0F13) (aux port): irq 12 [ 1.029336] fdc0 at acpi0 (FDC0, PNP0700): io 0x3f2-0x3f5,0x3f7 irq 6 drq 2 [ 1.029336] VGEN (QEMUVGID) at acpi0 not configured [ 1.029336] ACPI: Enabled 3 GPEs in block 00 to 0F [ 1.029336] pckbd0 at pckbc1 (kbd slot) [ 1.029336] pckbc1: using irq 1 for kbd slot [ 1.029336] wskbd0 at pckbd0: console keyboard [ 1.029336] pms0 at pckbc1 (aux slot) [ 1.029336] pckbc1: using irq 12 for aux slot [ 1.029336] wsmouse0 at pms0 mux 0 [ 1.029336] pci0 at mainbus0 bus 0: configuration mode 1 [ 1.029336] pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok [ 1.029336] pchb0 at pci0 dev 0 function 0: Intel 82441FX (PMC) PCI and Memory Controller (rev. 0x0 [ 1.029336] pcib0 at pci0 dev 1 function 0: Intel 82371SB (PIIX3) PCI-ISA Bridge (rev. 0x00) [ 1.029336] piixide0 at pci0 dev 1 function 1: Intel 82371SB IDE Interface (PIIX3) (rev. 0x00) [ 1.029336] piixide0: bus-master DMA support present [ 1.029336] piixide0: primary channel wired to compatibility mode [ 1.029336] piixide0: primary channel interrupting at ioapic0 pin 14 [ 1.029336] atabus0 at piixide0 channel 0 [ 1.029336] piixide0: secondary channel wired to compatibility mode [ 1.029336] piixide0: secondary channel interrupting at ioapic0 pin 15 [ 1.029336] atabus1 at piixide0 channel 1 [ 1.029336] uhci0 at pci0 dev 1 function 2: Intel 82371SB (PIIX3) USB Host Controller (rev. 0x01) [ 1.029336] uhci0: interrupting at ioapic0 pin 11 [ 1.029336] usb0 at uhci0: USB revision 1.0 [ 1.029336] piixpm0 at pci0 dev 1 function 3: Intel 82371AB (PIIX4) Power Management Controller (rev [ 1.029336] timecounter: Timecounter "piixpm0" frequency 3579545 Hz quality 1000 [ 1.029336] piixpm0: 24-bit timer [ 1.029336] piixpm0: interrupting at ioapic0 pin 9 [ 1.029336] iic0 at piixpm0 port 0: I2C bus [ 1.029336] vga0 at pci0 dev 2 function 0: vendor 1234 product 1111 (rev. 0x02) [ 1.029336] wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation), using wskbd0 [ 1.029336] wsmux1: connecting to wsdisplay0 [ 1.029336] drm at vga0 not configured [ 1.029336] virtio0 at pci0 dev 3 function 0 [ 1.029336] virtio0: memory balloon device (id 5, rev. 0x00) [ 1.029336] viomb0 at virtio0: features: 0x10000000<INDIRECT_DESC> [ 1.029336] virtio0: allocated 8192 byte for virtqueue 0 for inflate, size 128 [ 1.029336] virtio0: allocated 8192 byte for virtqueue 1 for deflate, size 128 [ 1.029336] virtio0: interrupting at ioapic0 pin 11 [ 1.029336] ppb0 at pci0 dev 5 function 0: Red Hat Qemu PCI-PCI (rev. 0x00) [ 1.029336] pci1 at ppb0 bus 1 [ 1.029336] pci1: i/o space, memory space enabled [ 1.029336] wm0 at pci0 dev 18 function 0, 64-bit DMA: Intel i82540EM 1000BASE-T Ethernet (rev. 0x [ 1.029336] wm0: interrupting at ioapic0 pin 10 [ 1.029336] wm0: 32-bit 33MHz PCI bus [ 1.029336] wm0: 64 words (6 address bits) MicroWire EEPROM [ 1.029336] wm0: RX packet buffer size: 48KB [ 1.029336] wm0: Ethernet address bc:24:11:28:4e:0d [ 1.029336] wm0: 0x200002<LOCK_EECD,WOL> [ 1.029336] makphy0 at wm0 phy 1: Marvell 88E1011 Gigabit PHY, rev. 0 [ 1.029336] makphy0: Failed to access EADR. Are you an emulator? [ 1.029336] makphy0: Failed to read EXTSR. Are you an emulator?. Regard as 1000BASE-T. [ 1.029336] makphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-F [ 1.029336] ppb1 at pci0 dev 30 function 0: Red Hat Qemu PCI-PCI (rev. 0x00) [ 1.029336] pci2 at ppb1 bus 2 [ 1.029336] pci2: i/o space, memory space enabled [ 1.029336] ppb2 at pci0 dev 31 function 0: Red Hat Qemu PCI-PCI (rev. 0x00) [ 1.029336] pci3 at ppb2 bus 3 [ 1.029336] pci3: i/o space, memory space enabled [ 1.029336] isa0 at pcib0 [ 1.029336] attimer0 at isa0 port 0x40-0x43 [ 1.029336] pcppi0 at isa0 port 0x61 [ 1.029336] spkr0 at pcppi0: PC Speaker [ 1.029336] wsbell at spkr0 not configured [ 1.029336] midi0 at pcppi0: PC speaker [ 1.029336] sysbeep0 at pcppi0 [ 1.029336] attimer0: attached to pcppi0 [ 1.029336] acpicpu0 at cpu0: ACPI CPU [ 1.029336] acpicpu0: C1: HLT, lat 0 us, pow 0 mW [ 1.029336] vmt0 at cpu0 [ 1.029336] vmt0: UUID: 744f4106-92e9-4346-8075-d18275f8edfd [ 1.029336] vmware: open failed, eax=0xffffffff, ecx=0x1e, edx=0x5658 [ 1.029336] vmt0: autoconfiguration error: failed to open backdoor RPC channel (TCLO protocol) [ 1.029336] acpicpu1 at cpu1: ACPI CPU [ 1.029336] acpicpu2 at cpu2: ACPI CPU [ 1.029336] acpicpu3 at cpu3: ACPI CPU [ 1.029336] timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0 [ 2.044826] IPsec: Initialized Security Association Processing. [ 2.054842] uhub0 at usb0: NetBSD (0x0000) UHCI root hub (0x0000), class 9/0, rev 1.00/1.00, addr [ 2.054842] uhub0: 2 ports with 2 removable, self powered [ 3.744874] uhidev0 at uhub0 port 1 configuration 1 interface 0 [ 3.744874] uhidev0: QEMU (0x0627) QEMU USB Tablet (0x0001), rev 2.00/0.00, addr 2, iclass 3/0 [ 3.754781] ums0 at uhidev0: 3 buttons and Z dir [ 3.754781] wsmouse1 at ums0 mux 0 [ 5.034767] wd0 at atabus0 drive 0 [ 5.034767] wd0: <QEMU HARDDISK> [ 5.044755] wd0: drive supports 16-sector PIO transfers, LBA48 addressing [ 5.044755] wd0: 256 GB, 532610 cyl, 16 head, 63 sec, 512 bytes/sect x 536870912 sectors [ 5.054776] wd0: GPT GUID: 42a7e333-2c05-4cbd-8664-1555d1755017 [ 5.054776] dk0 at wd0: "f0a8b571-d30a-43a6-a0ef-191b9afe08e7", 16777216 blocks at 2048, typ [ 5.054776] dk1 at wd0: "926b4afc-b71b-4615-9fd2-a2a845a4d129", 4194304 blocks at 1677926 [ 5.067931] dk2 at wd0: "da56269b-1ddb-4cb8-a470-e689f1e1dbe5", 515897311 blocks at 20973 [ 5.067931] wd0: 32-bit data port [ 5.067931] wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) [ 5.067931] wd0(piixide0:0:0): using PIO mode 4, DMA mode 2 (using DMA) [ 5.067931] atapibus0 at atabus1: 2 targets [ 5.074732] cd0 at atapibus0 drive 0: <QEMU DVD-ROM, QM00003, 2.5+> cdrom removable [ 5.074732] cd0: 32-bit data port [ 5.074732] cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) [ 5.074732] cd0(piixide0:1:0): using PIO mode 4, DMA mode 2 (using DMA) [ 5.084749] swwdog0: software watchdog initialized [ 5.104732] WARNING: 1 error while detecting hardware; check system log. [ 5.104732] boot device: wd0 [ 5.104732] root on dk0 dumps on dk1 [ 5.104732] root file system type: ffs [ 5.114878] kern.module.path=/stand/amd64/10.0/modules [ 20.034308] wsdisplay0: screen 1 added (80x25, vt100 emulation) [ 20.044324] wsdisplay0: screen 2 added (80x25, vt100 emulation) [ 20.054309] wsdisplay0: screen 3 added (80x25, vt100 emulation) [ 20.054309] wsdisplay0: screen 4 added (80x25, vt100 emulation)

3 2

Response not received
by hiren.bhatt＠westernunion.com 11 Aug '24

11 Aug '24

Here is current setup. Linux Server - Application ==> Stunnel in Client mode ==> Network ==> F5 havingTLS cert to decrypt traffic. We are runnign Stunnel in client mode to encrypt traffic with detination F5. F5 is equipped with TLS cert which decrypts traffic. Setup is working fine but we see some 0.2% traffic is impacted where Stunnel calling app in client side does not receive response. We are not running Stunnel on Server mode on destination. Packet capture does not show any abnormalities. Stunnel used by use is 4.62 coming out of Redhat distribution. We are clueless on traffic drop. Anyone with similar experiences can help?

1 0

stunnel for postgres
by Casey & Gina 10 Aug '24

10 Aug '24

Hi! I'm trying to set up stunnel for postgres, and cannot get it working. For the moment, I'm just trying to test locally on a Mac. I have set up postgres SSL correctly and confirmed that direct connections to the db with psql work with SSL. Here's the most promising config I've come up with: foreground = yes client = yes [postgresql] protocol = pgsql accept = 127.0.0.1:5433 connect = 127.0.0.1:5432 verify = 0 cert = /opt/homebrew/var/postgresql(a)16/server.crt key = /opt/homebrew/var/postgresql(a)16/server.key CAfile = /opt/homebrew/var/postgresql(a)16/ca.crt Here's what I'm getting: $ PGSSLMODE=disable psql -h 127.0.0.1 -p 5432 -U casey -d postgres -c 'select 1' -At 1 $ PGSSLMODE=require psql -h 127.0.0.1 -p 5432 -U casey -d postgres -c 'select 1' -At 1 $ PGSSLMODE=disable psql -h 127.0.0.1 -p 5433 -U casey -d postgres -c 'select 1' -At psql: error: connection to server at "127.0.0.1", port 5433 failed: server offered SCRAM-SHA-256-PLUS authentication over a non-SSL connection $ PGSSLMODE=require psql -h 127.0.0.1 -p 5433 -U casey -d postgres -c 'select 1' -At psql: error: connection to server at "127.0.0.1", port 5433 failed: FATAL: unsupported frontend protocol 1234.5679: server supports 3.0 to 3.0 Also, is it possible to connect to stunnel via UNIX socket instead of TCP? Thanks, -- Casey

3 2

Help
by Hugo Sarkissian 10 Aug '24

10 Aug '24

Hello, Tried to configure stunnel linked to pdm (solidworks) When I try I have an error : Service [ssmtp] started 2024.07.30 15:01:27 LOG7[1]: Setting local socket options (FD=1184) 2024.07.30 15:01:27 LOG7[1]: Option TCP_NODELAY set on local socket 2024.07.30 15:01:27 LOG5[1]: Service [ssmtp] accepted connection from 127.0.0.1:60652 2024.07.30 15:01:27 LOG6[1]: Peer certificate not required 2024.07.30 15:01:27 LOG7[1]: TLS state (accept): before SSL initialization 2024.07.30 15:01:37 LOG7[1]: TLS alert (write): fatal: record overflow 2024.07.30 15:01:37 LOG3[1]: error queue: ssl/record/rec_layer_s3.c:645: error:0A000139:SSL routines::record layer failure 2024.07.30 15:01:37 LOG3[1]: SSL_accept: ssl/record/methods/tls_common.c:654: error:0A0000C6:SSL routines::packet length too long 2024.07.30 15:01:37 LOG5[1]: Connection reset/closed: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2024.07.30 15:01:37 LOG7[1]: Local descriptor (FD=1184) closed 2024.07.30 15:01:37 LOG7[1]: Service [ssmtp] finished (0 left) My config : ; Configuration de Stunnel ; Niveau de journalisation debug = 7 output = stunnel.log ; Service SMTP sécurisé [ssmtp] accept = 127.0.0.1:25 connect = 127.0.0.1:587 cert = C:\Program Files (x86)\stunnel\config\stunnel.pem key = C:\Program Files (x86)\stunnel\config\stunnel.pem ; Protocoles et suites de chiffrement sslVersion = all ciphers = ALL:!aNULL:!MD5 renegotiation = no options = NO_SSLv2 TIMEOUTclose = 0 Can you help me please [cid:logopiabgroup_89c2c8d4-09f6-4cf6-87f9-3682b4094f7c.jpg] Hugo Sarkissian IT Operation Support Technician Piab Group Montelier FR (+33) 7 88 06 22 31 Hugo.Sarkissian(a)piabgroup.com<mailto:[email protected]> Please consider your environmental responsibility. Before printing this email message, ask yourself whether you really need a hard copy.

2 1

421 mismatched
by d.arlo.421642＠gmail.com 07 Aug '24

07 Aug '24

Hi I am running stunnel on my local pc win10. Trying to stunnel to https://api.interactsms.com/HTTP_API/V1/sendmessage.aspx?user=User1&passwor… Password1&api_id=9876&to=353879999999&text=HelloWorld&from=YourCompany which gives me wrong user name and password which is fine. if I Stunnel this http://localhost:8083/HTTP_API/V1/sendmessage.aspx?user=User1&password=Pass… I get Misdirected Request The client needs a new connection for this request as the requested host name does not match the Server Name Indication (SNI) in use for this connection. Is this a problem with the site or my Stunnel config? when I installed Stunnel, I used localhost for the CN. I have tried downloading the client, intermediate and CA cert with the below config... ;cert = D:\Program Files (x86)\stunnel\config\sms\interactsms-com.pem ;CAfile= D:\Program Files (x86)\stunnel\config\sms\godaddyca.pem this is current config... [sms] client = yes accept = 8083 connect = api.interactsms.com:443 cert = D:\Program Files (x86)\stunnel\config\stunnel.pem

3 3

OCSP: The root CA certificate was not found
by akos.schneemaier＠gmail.com 06 Aug '24

06 Aug '24

Hi, this is my first post on this mailing list. I did extensive search and tried to resolve the issue I have in pfsense with stunnel. Pfsense CE 2.7.2 uses stunnel 5.71. In my config I created certificate using the acme package with Let's ecrypt. The created certificate works fine in pfsense wenb consol and also with stunnel 5.68 on Debian, but it does not work with stunnel 5.71 on Pfsense. All connections going through stunnel get are timing out and the stunnel log has the following in it: ``` Jul 19 00:53:08 router1 stunnel[2933]: LOG5[6]: Service [XXXX] accepted connection from xxxxxx:46415 Jul 19 00:53:08 router1 stunnel[2933]: LOG6[6]: Peer certificate not required Jul 19 00:53:08 router1 stunnel[2933]: LOG6[6]: OCSP: The root CA certificate was not found Jul 19 00:53:08 router1 stunnel[2933]: LOG5[6]: OCSP: Connecting the AIA responder "http://r10.o.lencr.org" Jul 19 00:56:05 router1 stunnel[2933]: LOG3[6]: Error resolving "r10.o.lencr.org": Address family for nodename not supported (EAI_ADDRFAMILY) Jul 19 00:56:05 router1 stunnel[2933]: LOG3[6]: OCSP: Failed to resolve the OCSP responder address Jul 19 00:56:05 router1 stunnel[2933]: LOG6[6]: OCSP: No OCSP stapling response to send Jul 19 00:56:05 router1 stunnel[2933]: LOG3[6]: SSL_accept: /var/jenkins/workspace/pfSense-CE-snapshots-2_7_2-main/sources/FreeBSD-src-RELENG_2_7_2/crypto/openssl/ssl/record/rec_layer_s3.c:304: error:0A000126:SSL routines::unexpected eof while reading Jul 19 00:56:05 router1 stunnel[2933]: LOG5[6]: Connection reset/closed: 0 byte(s) sent to TLS, 0 byte(s) sent to socket ``` So far i tried: 1. Creating new certificate with acme 2. Unisntall and reinstall both acme and stunnel 3. Tried new cetrificate provider (zerossl) 4. tried adding "OCSPrequire = no" to stunnel.conf based on https://www.stunnel.org/mailman3/hyperkitty/list/[email protected]/… None of the above fixed the issue and not I am not sure how to resolve it. I have another Pfsense installation where all these things work fine. I compaired the stunnel.conf files, but there are identical (except the certificate ofcourse). I looked into the source code and found that the error message is comming from ocsp_params_append_root_ca function in opcs.c, but I ma not a C programer and neither familiar with the stunnel code to figure out more. I hope someone from the stunnel list has some ideas how to proceed based on the logs above. Thank you!

3 2

Error stnnul linked to PDM (solidwork)
by hugo.sarkissian＠coval.com 30 Jul '24

30 Jul '24

Hello, I have this error : 2024.07.30 15:01:37 LOG7[1]: TLS alert (write): fatal: record overflow 2024.07.30 15:01:37 LOG3[1]: error queue: ssl/record/rec_layer_s3.c:645: error:0A000139:SSL routines::record layer failure 2024.07.30 15:01:37 LOG3[1]: SSL_accept: ssl/record/methods/tls_common.c:654: error:0A0000C6:SSL routines::packet length too long 2024.07.30 15:01:37 LOG5[1]: Connection reset/closed: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2024.07.30 15:01:37 LOG7[1]: Local descriptor (FD=1184) closed 2024.07.30 15:01:37 LOG7[1]: Service [ssmtp] finished (0 left) my conf is: ; Configuration de Stunnel ; Niveau de journalisation debug = 7 output = stunnel.log ; Service SMTP sécurisé [ssmtp] accept = 127.0.0.1:25 connect = 127.0.0.1:587 cert = C:\Program Files (x86)\stunnel\config\stunnel.pem key = C:\Program Files (x86)\stunnel\config\stunnel.pem ; Protocoles et suites de chiffrement sslVersion = all ciphers = ALL:!aNULL:!MD5 renegotiation = no options = NO_SSLv2 TIMEOUTclose = 0 can you help me please i don't understant

1 0

stunnel not able to daisy-chain transparent connections
by ftsanetamot 29 Jul '24

29 Jul '24

Hello, I struggled recently, with combining sslh and nginx daisy-chaining ip-transparent connections, and realised the same problem, other users reported, when using stunnel. Now that I have found a fix, which solves my problem with sslh, I checked into the stunnel code, and adapted my proposed fix for stunnel: diff client.c_original client.c 1721a1722,1723 > if (setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on)) > sockerror("setsockopt SO_REUSEADD"); 1769a1772,1776 > int on = 1; > #ifdef IP_TRANSPARENT > if (setsockopt(c->fd, SOL_IP, IP_TRANSPARENT, &on, sizeof on)) > sockerror("setsockopt SO_IP_TRANSPARENT");> #endif I described my findings here in Detail: https://github.com/ftasnetamot/sslh/blob/2024-07-28--documentation/doc/Dais… This article helped me to figure out, what is wrong: https://blog.cloudflare.com/how-to-stop-running-out-of-ephemeral-ports-and-… I wrote as well some weeks earlier two documents, describing how to configure ip-transparent connections only with routing and no firewall rules involved. The same works 1:1 with stunnel. https://github.com/yrutschle/sslh/blob/master/doc/simple_transparent_proxy.… https://github.com/yrutschle/sslh/blob/master/doc/scenarios-for-simple-tran… Happy tunneling .f Sicher versendet mit [Proton Mail](https://proton.me/).

1 0

How to verify a certificate
by William Wood 24 Jul '24

24 Jul '24

I have tried everything I can think of, and even though I have certificates that are marked as "valid" when I look at the lock icon for an https: site, I get a verification "fail": CERT: Pre-verification error: self-signed certificate in certificate chain From everything I have read, my understanding is that every chain of certificates starts with a self-signed certificate I have even queried my Windows certificate management, and the issuer of the certificate is Entrust, which is on the list of trusted issuers. Within openssl, I get the same error: error 18 at 0 depth lookup: self signed certificate There is talk of a CApath, as well as lists of trusted issuers, but I do not understand anything within the documentation for stunnel which suggests how to access this information and incorporate it in the functioning of the program. Any help would be much appreciated! Thanks in advance -William Wood

2 1

Almost there - openssl verifies remote certificate, but stunnel still fails
by William Wood 24 Jul '24

24 Jul '24

In Windows 10 I have done the following: 1. Created a directory C:\Certificates\ 2. From the Microsoft Management Concole (MMC) I have exported all the "Trusted Root Certificate Authorities\Certificates" as Personal Information exchange .PFX with a passcode 3. Using a Powershell environment, I change directories to C:\Certificates\ and run openssl From the openssl prompt convert the above .PFX file to a .pem file openssl pkcs12 -in All_Trusted.pfx -out All_Trusted.pem -nodes 4. Next I run the following openssl command OpenSSL s_client -CApath c:\Certificates\ -connect api.gainfutures.com:9400 -CAfile All_Trusted.pem After a bunch of output, I get the notification Verification: OK This tells me that the verification has passed the remote certificate. Using this to inform my stunnel configuration, I configure: [GainFuturesConnect] client = yes accept = 127.0.0.1:8080 connect = 192.111.85.171:9400 CAfile = C:\Certificates\All_Trusted.pem CApath = C:\Certificates\ securityLevel = 1 verifyChain = yes checkHost = api.gainfutures.com:9400 sslVersion = TLSv1.2 sslVersionMax = TLSv1.2 ciphers = DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256 Although the preverification succeeds at each "depth", the verification fails at the end: CERT: Pre-verification succeeded (**Note, this is a change from before I added the above CAfile and CApath values**) CERT: Subject checks failed Rejected by CERT at depth=0: C=GB, L=London, O=Gain Capital UK Limited, CN=*.gainfutures.com Remove session callback TLS alert (write): fatal: internal error SSL_connect: ssl/statem/statem_clnt.c:2091: error:0A000086:SSL routines::certificate verify failed So my question becomes two parts: 1. How do I get the Subject checks to pass for CERT; 2. How do I get rid of the TLS "write" alert which is an internal error? Thank you -William Wood

1 0

Re: Trying to get stunnel to verify remote server certificate
by William Wood 18 Jul '24

18 Jul '24

Thank you Mike for your reply. I apologize for my lack of experience with networks. One thing that I personally did not understand in using stunnel is that my SSL traffic that I want to "wrap" needs to be directed at the "accept" port, and that the stunnel wrap THEN sends it out over the connect port with the SSL "magic" applied. With that in mind, I have amended my configuration, and I have a new problem (s?): client = yes accept = 127.0.0.1:8080 connect = 192.111.85.171:9400 cert = C:\Certificates\WMW_trade_csr.pem CAfile = C:\Certificates\ca-cert1.pem securityLevel = 0 verifyPeer = yes checkHost = api.gainfutures.com sslVersion = TLSv1.2 sslVersionMax = TLSv1.2 This binds the service to 127.0.0.1:8080 So far so good. When I start my program, which directs its output stream to the "accept" port, the stunnel log now responds as I send messages: (I have pulled out just the last part before the error) 2024.07.18 12:19:45 LOG6[1150]: Peer certificate required 2024.07.18 12:19:45 LOG7[1150]: TLS state (connect): before SSL initialization 2024.07.18 12:19:45 LOG7[1150]: Initializing application specific data for session authenticated 2024.07.18 12:19:45 LOG7[1150]: TLS state (connect): SSLv3/TLS write client hello 2024.07.18 12:19:45 LOG7[1150]: TLS state (connect): SSLv3/TLS write client hello 2024.07.18 12:19:45 LOG7[1150]: TLS state (connect): SSLv3/TLS read server hello This looks okay to me so far 2024.07.18 12:19:45 LOG7[1150]: Verification started at depth=2: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2009 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G2 2024.07.18 12:19:45 LOG6[1150]: CERT: Pre-verification error ignored: self-signed certificate in certificate chain 2024.07.18 12:19:45 LOG6[1150]: OCSP: Certificate chain verification disabled 2024.07.18 12:19:45 LOG6[1150]: Certificate accepted at depth=2: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2009 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G2 2024.07.18 12:19:45 LOG7[1150]: Verification started at depth=2: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2009 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G2 2024.07.18 12:19:45 LOG7[1150]: CERT: Pre-verification succeeded 2024.07.18 12:19:45 LOG6[1150]: OCSP: Certificate chain verification disabled 2024.07.18 12:19:45 LOG6[1150]: Certificate accepted at depth=2: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2009 Entrust, Inc. - for authorized use only", CN=Entrust Root Certification Authority - G2 2024.07.18 12:19:45 LOG7[1150]: Verification started at depth=1: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2012 Entrust, Inc. - for authorized use only", CN=Entrust Certification Authority - L1K 2024.07.18 12:19:45 LOG7[1150]: CERT: Pre-verification succeeded 2024.07.18 12:19:45 LOG6[1150]: OCSP: Certificate chain verification disabled 2024.07.18 12:19:45 LOG6[1150]: Certificate accepted at depth=1: C=US, O="Entrust, Inc.", OU=See www.entrust.net/legal-terms, OU="(c) 2012 Entrust, Inc. - for authorized use only", CN=Entrust Certification Authority - L1K 2024.07.18 12:19:45 LOG7[1150]: Verification started at depth=0: C=GB, L=London, O=Gain Capital UK Limited, CN=*.gainfutures.com 2024.07.18 12:19:45 LOG7[1150]: CERT: Pre-verification succeeded 2024.07.18 12:19:45 LOG6[1150]: CERT: Host name "api.gainfutures.com" matched with "*.gainfutures.com" 2024.07.18 12:19:45 LOG4[1150]: CERT: Certificate not found in local repository not sure what this indicates (not found in local repository) 2024.07.18 12:19:45 LOG4[1150]: Rejected by CERT at depth=0: C=GB, L=London, O=Gain Capital UK Limited, CN=*.gainfutures.com 2024.07.18 12:19:45 LOG7[1150]: Remove session callback 2024.07.18 12:19:45 LOG7[1150]: TLS alert (write): fatal: bad certificate 2024.07.18 12:19:45 LOG3[1150]: SSL_connect: ssl/statem/statem_clnt.c:2091: error:0A000086:SSL routines::certificate verify failed After looking on the internet, I think that the [TLS alert (write): fatal: bad certificate] may refer to the cert = (file.pem), which in this case is a certificate I had made and verified by a trusted authority. The rejected by CERT is clearly referring to the certificate which comes from the server located at the other end of the "connect" port. I have looked specifically at this certificate, and the chain is comprised of two authenticated certificates, with a self-authenticated third certificate. As an example, when I change the "checkHost =" to an IP address, the error message changes: 2024.07.18 12:40:45 LOG7[1157]: CERT: Pre-verification succeeded *2024.07.18 12:40:45 LOG4[1157]: CERT: Subject checks failed *2024.07.18 12:40:45 LOG4[1157]: Rejected by CERT at depth=0: C=GB, L=London, O=Gain Capital UK Limited, CN=*.gainfutures.com 2024.07.18 12:40:45 LOG7[1157]: Remove session callback *2024.07.18 12:40:45 LOG7[1157]: TLS alert (write): fatal: unknown CA What seems to be consistent is that the remote certificate is being rejected because there is a self-authenticated certificate as the third part of the chain. I have tried the following: CAfile = C:\Certificates\ca-cert.pem (CA file which comes with openssl, I believe) which gives the same results. CAfile = C:\Certificates\ca-cert1.pem (Here I have added the chain certificates from file gain-futures-chain.pem) same results CAfile = C:\Certificates\ca-cert2.pem (Here I have added the chain certificates from file gain-futures-chainpumpbut removed the self-signed part) same results CAfile =C:\Certificates\ca-cert3.pem (ca-cert3.pem contains ONLY the certificates from gain-futures-chain.pem) same results CAfile =C:\Certificates\gain-futures-chain.pem This causes the service NOT to be bound, and throws what look like a bunch of openssl errors So it appears that I am actually probing the certificate that the remote server is sending me. I am still not clear on the role of CAfile, because of the behavior I have outlined. Do I need somehow to find a CAfile which recognizes and validates the certificate from the remote server? Thank you again! -William Wood

1 0

Trying to get stunnel to verify remote server certificate
by William Wood 15 Jul '24

15 Jul '24

I have downloaded the remote certificates, and configured stunnel: client = no accept = 127.0.0.1:9400 connect = 192.111.85.171:9400 cert = C:\Certificates\gain-futures-chain.pem verifyChain = yes verifyPeer = yes checkHost = 192.111.85.171 checkIP = api.gainfutures.com sslVersion = TLSv1.1 options = NO_SSLv2 options = NO_SSLv3 OCSPaia = yes This results in the failure to initialize the tLS context: 2024.07.15 08:40:50 LOG7[service]: Found 1 ready file descriptor(s) 2024.07.15 08:40:50 LOG7[service]: FD=580 ifds=r-x ofds=r-- 2024.07.15 08:40:50 LOG7[service]: FD=640 ifds=r-x ofds=--- 2024.07.15 08:40:50 LOG7[service]: Dispatching a signal from the signal pipe 2024.07.15 08:40:50 LOG7[service]: Processing SIGNAL_RELOAD_CONFIG 2024.07.15 08:40:50 LOG6[service]: Initializing inetd mode configuration 2024.07.15 08:40:50 LOG7[service]: Running on Windows 6.2 2024.07.15 08:40:50 LOG5[service]: Reading configuration from file C:\Program Files (x86)\stunnel\config\stunnel.conf 2024.07.15 08:40:50 LOG5[service]: UTF-8 byte order mark not detected 2024.07.15 08:40:50 LOG5[service]: FIPS mode disabled 2024.07.15 08:40:50 LOG6[service]: Compression disabled 2024.07.15 08:40:50 LOG7[service]: No PRNG seeding was required 2024.07.15 08:40:50 LOG6[service]: Initializing service [GainFuturesConnect] 2024.07.15 08:40:50 LOG7[service]: Initializing context [GainFuturesConnect] 2024.07.15 08:40:50 LOG6[service]: OpenSSL security level is used: 2 2024.07.15 08:40:50 LOG7[service]: Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK 2024.07.15 08:40:50 LOG7[service]: TLSv1.3 ciphersuites: TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256 2024.07.15 08:40:50 LOG7[service]: TLS options: 0x2100000 (+0x2000000, -0x0) 2024.07.15 08:40:50 LOG6[service]: Session resumption enabled 2024.07.15 08:40:50 LOG6[service]: Loading certificate from file: C:\Certificates\gain-futures-chain.pem 2024.07.15 08:40:50 LOG3[service]: error queue: ssl/ssl_rsa.c:472: error:0A080002:SSL routines::system lib 2024.07.15 08:40:50 LOG3[service]: error queue: crypto/bio/bss_file.c:300: error:10080002:BIO routines::system lib 2024.07.15 08:40:50 LOG3[service]: SSL_CTX_use_certificate_chain_file: crypto/bio/bss_file.c:297: error:80000002:system library::No such file or directory 2024.07.15 08:40:50 LOG3[service]: Service [GainFuturesConnect]: Failed to initialize TLS context 2024.07.15 08:40:50 LOG3[service]: Configuration failed 2024.07.15 08:40:50 LOG7[service]: Deallocating temporary section defaults 2024.07.15 08:40:50 LOG7[service]: Cleaning up context [(null)] 2024.07.15 08:40:50 LOG7[service]: Deallocating section [GainFuturesConnect] 2024.07.15 08:40:50 LOG7[service]: Cleaning up context [GainFuturesConnect] 2024.07.15 08:40:50 LOG3[service]: Failed to reload the configuration file This is the best I can gather regarding getting verification of the REMOTE certificate. The problem is that I am unable to connect if I cannot verify their certificate - they are not looking at my certificate. Any help would be appreciated. Thank you! -William Wood

2 1

Help installing stunnel 5.72 as service in windows 10
by William Wood 04 Jul '24

04 Jul '24

Apparently to get stunnel to work, I have to install it as a service in Windows. In order to do this, I fire up a powershell, change directories to the stunnel\bin\, and run the command: .\stunnel -install This results in the error message: OpenSCManager: error 5: Access is denied Not sure what to do, as I am running as an administrator Any help would be appreciated Thanks -William Wood

2 2

How to connect to a website through a port
by William Wood 02 Jul '24

02 Jul '24

Hi - I am trying to connect securely to a website from a Windows 10 machine: gainfutures.com through the port: 9400 I am told I need to do this using SSL. I have a python script which successfully connects through their non-secure ports. I am given no other information about what is needed for the connection, so I am asking how to do this. I have added to the configuration file: accept=gainfutures.com:9400 connect=gainfutures:9400 The "accept" line results in the error: Can't assign requested address (WSAEADDRNOTAVAIL) (10049) the "connect" line has no effect in the messages. Any suggestions would be much appreciated. Thank you -WW

2 1

help connecting to a website through a port from Windows 10
by William Wood 02 Jul '24

02 Jul '24

Hi - I am trying to connect securely to a website from a Windows 10 machine: gainfutures.com through the port: 9400 I am told I need to do this using SSL. I have a python script which successfully connects through their non-secure ports. I am given no other information about what is needed for the connection, so I am asking how to do this. I have added to the configuration file: accept=gainfutures.com:9400 connect=gainfutures:9400 The "accept" line results in the error: Can't assign requested address (WSAEADDRNOTAVAIL) (10049) the "connect" line has no effect in the messages. Any suggestions would be much appreciated. Thank you -WW

1 0

How to specify OCSP responder URL in "server" mode?
by sbworkde＠gmail.com 02 Jul '24

02 Jul '24

I want to specify OCSP responder URL while stunnel in "server" mode. I tried to use the option "OCSP" in configuration file, but it only works in "client" mode. The OCSP responder URL is always read form AIA while stunnel is in "server" mode, even when I set "OCSPaia = no". Is there a way to specify OCSP resonder URL for "server" mode?

2 1

Stunnel with tinyproxy seem failed to forward
by jensen＠fixes.hk 29 Jun '24

29 Jun '24

Stunnel config client = no cert = /path/to/fullchain.pem key = /path/to/privkey.pem pid = /var/run/stunnel4/stunnel.pid debug = 7 output = /var/log/stunnel4/stunnel.log [tinyproxy] accept = 0.0.0.0:8443 connect = 127.0.0.1:7777 here's the log 2024.06.28 11:08:26 LOG7[main]: Found 1 ready file descriptor(s) 2024.06.28 11:08:26 LOG7[main]: FD=4 events=0x2001 revents=0x0 2024.06.28 11:08:26 LOG7[main]: FD=9 events=0x2001 revents=0x1 2024.06.28 11:08:26 LOG7[main]: Service [tinyproxy] accepted (FD=3) from X.X.X.X:42086 2024.06.28 11:08:26 LOG7[3]: Service [tinyproxy] started 2024.06.28 11:08:26 LOG7[3]: Setting local socket options (FD=3) 2024.06.28 11:08:26 LOG7[3]: Option TCP_NODELAY set on local socket 2024.06.28 11:08:26 LOG5[3]: Service [tinyproxy] accepted connection from X.X.X.X:42086 2024.06.28 11:08:26 LOG6[3]: Peer certificate not required 2024.06.28 11:08:26 LOG7[3]: TLS state (accept): before SSL initialization 2024.06.28 11:08:26 LOG3[3]: SSL_accept: ../ssl/record/ssl3_record.c:348: error:0A00009B:SSL routines::https proxy request 2024.06.28 11:08:26 LOG5[3]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket 2024.06.28 11:08:26 LOG7[3]: local_rfd/local_wfd reset (FD=3) 2024.06.28 11:08:26 LOG7[3]: Local descriptor (FD=3) closed 2024.06.28 11:08:26 LOG7[3]: Service [tinyproxy] finished (0 left) on connect, I'm using server with OS Ubuntu16.04 with OpenSSL 1.1.1n 15 Mar 2022 (Library: OpenSSL 1.1.1 11 Sep 2018). using my other server (OS ubuntu 2X.) and my local (Mac OS), I'm able to connect to stunnel + tinyproxy successfully. it seems the issue within the server with Ubuntu16.04 or did I miss other config ?

3 5

Devo Relay(Stunnel) -> Palo Alto Log Ingestion Configuration
by jeykipamca＠hotmail.com 14 Jun '24

14 Jun '24

Hi!, I am trying to ingest Palo Alto Firewall syslogs from Devo SIEM, to do that, I had to implement Stunnel on my relay server but in the installation part, I got this error message (I couldn't start stunnel service and I set all the configs as mentioned below links); devo-relay-server:/etc/stunnel# systemctl status stunnel4.service × stunnel4.service - LSB: Start or stop stunnel 4.x (TLS tunnel for network daemons) Loaded: loaded (/etc/init.d/stunnel4; generated) Active: failed (Result: exit-code) since Fri 2024-06-14 13:42:04 UTC; 58min ago Docs: man:systemd-sysv-generator(8) CPU: 27ms Jun 14 13:42:04 -devo-relay-server stunnel4[4032]: [.] Reading configuration from file /etc/stunnel/stunnel.conf Jun 14 13:42:04 -devo-relay-server stunnel4[4032]: [.] UTF-8 byte order mark not detected Jun 14 13:42:04 -devo-relay-server stunnel4[4032]: [!] /etc/stunnel/stunnel.conf:6: "setuid = test": Illegal UID Jun 14 13:42:04 -devo-relay-server stunnel4[4032]: [!] Configuration failed Jun 14 13:42:04 -devo-relay-server stunnel4[4032]: [ ] Deallocating temporary section defaults Jun 14 13:42:04 -devo-relay-server stunnel4[4018]: failed Jun 14 13:42:04 -devo-relay-server stunnel4[4018]: You should check that you have specified the pid= in you configuration file Jun 14 13:42:04 -devo-relay-server systemd[1]: stunnel4.service: Control process exited, code=exited, status=1/FAILURE Jun 14 13:42:04 -devo-relay-server systemd[1]: stunnel4.service: Failed with result 'exit-code'. Jun 14 13:42:04 -devo-relay-server systemd[1]: Failed to start LSB: Start or stop stunnel 4.x (TLS tunnel for network daemons). root@-devo-relay-server:/etc/stunnel# -------------------------------------------------------------- My conf file; /etc/stunnel/stunnel.conf ; ************************************************************************** ; * Global options * ; ************************************************************************** ; It is recommended to drop root privileges if stunnel is started by root setuid = test setgid = test ; PID file is created inside the chroot jail (if enabled) pid = /var/run/stunnel4/stunnel.pid ; Debugging stuff (may be useful for troubleshooting) ;foreground = yes ;debug = debug output = /var/log/stunnel4/stunnel.log [firewall_tunnel] client = no accept = 6515 connect = 127.0.0.1:13005 cert = /etc/pki/stunnel/cert_SyslogCert-Devo.pem verifyChain = yes verifyPeer = yes CAfile = /etc/pki/stunnel/cert_RootCA-Devo.crt -------------------------------------------------------------- /etc/default/stunnel4 file; # /etc/default/stunnel # Julien LEMOINE <speedblue(a)debian.org> # September 2003 ENABLED=1 FILES="/etc/stunnel/*.conf" OPTIONS="" # Change to one to enable ppp restart scripts PPP_RESTART=0 # Change to enable the setting of limits on the stunnel instances # For example, to set a large limit on file descriptors (to enable # more simultaneous client connections), set RLIMITS="-n 4096" # More than one resource limit may be modified at the same time, # e.g. RLIMITS="-n 4096 -d unlimited" RLIMITS="" -------------------------------------------------------------- Does anyone have knowledge about the issue? The links which I got support. https://docs.devo.com/space/latest/94663679/Sending+Palo+Alto+events+to+Dev… https://docs.devo.com/space/latest/96469881/Sending+SSL%2FTLS+encrypted+eve…

1 0

Can I use stunnel to create a proxy chain?
by Eugene Bos 11 Jun '24

11 Jun '24

Hello. I have a proxy with http/socks5 support but this configuration doesnt work: client = yes [my-proxy] accept = 127.0.0.1:9666 connect = proxy.com:10000 protocol = connect protocolHost = username__cr.ua:[email protected]:10000 I wanted to proxy requests sent to 127.0.0.1:9666 to username__cr.ua:p [email protected]:10000

1 0

help required with stunnel cipher set up
by Glick, Daniel 11 Jun '24

11 Jun '24

Classification: Restricted Dear All, Objective : We have been informed by Euroclear that we must use the following ciphers below with our stunnel connection to them TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 Server details : [cid:[email protected]] The required cipher has been defined as being the first in the list. [cid:[email protected]] Information security has confirmed that the cipher has been enabled [cid:[email protected]] However after rebooting the server and starting stunnel – the old ciphers are still being used [cid:[email protected]] Please can anyone point us in the right direction as to what we are doing wrong. Thank you Daniel Glick Application Specialist, Investment Management & Finance Platform Arbuthnot Latham & Co., Limited ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender and delete it from your system. Internet communications are not secure and therefore Arbuthnot Latham & Co., Limited does not accept legal responsibility for the contents of this message or any damage sustained as a result of this email or its attachments. Any views or opinions presented are solely those of the author and do not necessarily represent those of Arbuthnot Latham & Co., Limited or any of its affiliates. Please take some time to read our Privacy Notice, which provides information on what personal data we collect from you, what we do with it and who it might be shared with. *********************************************************************** Arbuthnot Latham & Co., Limited Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. Arbuthnot Latham & Co., Limited, DIFC Branch, is regulated by the Dubai Financial Services Authority ("DFSA"). Registered in England and Wales 819519. Registered office: Arbuthnot House 7 Wilson Street London EC2M 2SN Tel : 020 7012 2500 Fax : 020 7012 2501 ************************************************************************

4 4

GRE over Stunnel
by marslogout＠gmail.com 17 May '24

17 May '24

Hello, is it possible to use GRE with Stunnel? I know that GRE is a protocol different from TCP, but I would like to hear your opinion on this matter. If GRE is not supported, would it be correct to replace it with PPTP without encryption?

1 0

Stunnel with no encryption
by Castro, Flavio 16 May '24

16 May '24

Hello, I am trying to configure Stunnel to use the insecure cipher PSK-NULL-SHA@SECLEVEL=0 but am encountering issues where a different cipher appears to be negotiated instead. My goal is to authenticate endpoints without encryption. Here are the details of my setup: Stunnel Version: 5.63 Operating System: Ubuntu Stunnel Configuration: ; Stunnel Configuration ; Global Options fips = no output = /var/log/stunnel.log ; Specify the pre-shared key file PSKsecrets = /etc/stunnel/psk.txt sslVersion = TLSv1.2 ; PSK Server Configuration [PSK server] accept = 192.168.20.11:5074 connect = 192.168.30.11:5074 ciphers = PSK-NULL-SHA ; In OpenSSL, I can achieve my goal using the following command, which works as expected: openssl s_client -port 5074 -cipher "PSK-NULL-SHA@SECLEVEL=0" -psk 4f8583bca4d311ee9fd6034d1fcbd7c3 -tls1 However, with Stunnel, it appears a different cipher is negotiated, and I do not see any error messages in the logs. I tcpdumped the connection and observed the traffic is being encrypt which was not the case when using openssl. In my usecase I need to authenticate endpoints without encryption, hence the use of PSK-NULL-SHA@SECLEVEL=0. Could you please advise on how to properly configure Stunnel to use the PSK-NULL-SHA@SECLEVEL=0 cipher, or if this is supported? Thank you for your assistance. Flavio Castro

1 0

use openvpn service through socks
by Alberto P 27 Apr '24

27 Apr '24

Hi, I have a paying vpn service that offers a few connection modes but no socks or http proxy Is it possible to use stunnel to 1) connect to the vpn service via openvpn (I have server_name, user, pass, config file) 2) make this vpn available through a socks5 proxy on my local network or localhost ? Any help with config files would be greatly appreciated

1 0

Next release of stunnel
by Heyes, Chad (Coral Springs) 25 Apr '24

25 Apr '24

Hello, We have a number of clients currently using stunnel to communicate securely from emulator software to our Unisys host. We have been coordinating with them when stunnel need to be updated. Is there a plan to update stunnel version anytime soon? I understand that it may be a 'last minute' decision based on security vulnerabilities. However, any advance notice would be helpful. Thanks, Chad Heyes Software Architect, Advisory Product Development, Bank Solutions Fiserv www.fiserv.com<http://www.fiserv.com/> Fiserv<http://links.mkt030.com/ctt?kn=3&ms=MjI3MTE3NzAS1&r=MjE1MjQ1MjA0Mjk5S0&b=0&…> | Join Our Team<http://links.mkt030.com/ctt?kn=7&ms=MjI3MTE3NzAS1&r=MjE1MjQ1MjA0Mjk5S0&b=0&…> | Twitter<http://links.mkt030.com/ctt?kn=1&ms=MjI3MTE3NzAS1&r=MjE1MjQ1MjA0Mjk5S0&b=0&…> | LinkedIn<http://links.mkt030.com/ctt?kn=5&ms=MjI3MTE3NzAS1&r=MjE1MjQ1MjA0Mjk5S0&b=0&…> | Facebook<http://links.mkt030.com/ctt?kn=9&ms=MjI3MTE3NzAS1&r=MjE1MjQ1MjA0Mjk5S0&b=0&…> FORTUNE Magazine World's Most Admired Companies(r) 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 (c) 2018 Fiserv Inc. or its affiliates. Fiserv is a registered trademark of Fiserv Inc. Privacy Policy

2 1

Re: TLSv1.0 and TLSv1.1 - unable to disable
by Josealf.rm 24 Apr '24

24 Apr '24

1 0

TLSv1.0 and TLSv1.1 - unable to disable
by Alan Flores 23 Apr '24

23 Apr '24

Hello: I have not been able to get STunnel to disable these protocols. In the STunnel.conf file I put in the line sslVersionMin = TLSv1.2 I have disabled these in windows 2019 via reg keys But this has not stopped scans from seeing TLSv1.0 and 1.1 Any help would be appreciated stunnel 5.72 on x64-pc-mingw32-gnu platform Windows server 2019 Compiled/running with OpenSSL 3.2.1 30 Jan 2024 Alan Flores Enterprise Support Specialist Enterprise Application Systems E: Alan.Flores(a)Valpo.edu <http://www.valpo.edu> 1700 Chapel Drive, Valparaiso, IN 46383

1 0

using a socks5 with user/name authentication
by Alberto P 21 Apr '24

21 Apr '24

Hello, I have a vpn service that provides a socks5 proxy using user/pass authentication. Using stunnel would allow me to use the service with other clients that allow for a socks5 proxy but normally no authentication. Could anybody tell me 1) is what I'd like feasible ? 2)How do I provide user/pass to the configuration file ? Your help would be very appreciated ! alberto

1 0

Wondering if process to create the g2.pem file is available?
by Michael D. Setzer II 19 Apr '24

19 Apr '24

Was wondering if the process to create the g2.pem file you shared is available. It does work with changes to the stunnel.conf file for both the smtp1.guam.net and mail.guam.net [guampop] client=yes accept = 127.0.0.1:20996 connect = mail.guam.net:995 debug = 7 verifyChain = yes CApath = /etc/ssl/certs CAfile = /etc/stunnel/g2.pem checkHost = mail.guam.net OCSPaia = yes [guamsmtp] client=yes accept = 127.0.0.1:20466 connect = smtp1.guam.net:465 debug = 7 verifyChain = yes CApath = /etc/ssl/certs CAfile = /etc/stunnel/g2.pem checkHost = smtp1.guam.net OCSPaia = yes Not sure the the g2.pem would work for all time, or has an expiration date. Thanks. +------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:[email protected] mailto:[email protected] mailto:[email protected] Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+

1 0

Having strange issue with newer kernels? 6.8.
by Michael D. Setzer II 19 Apr '24

19 Apr '24

3 2

unknow TCP service 11702
by tomoyalin＠yahoo.co.jp 18 Apr '24

18 Apr '24

how to solve problem from stunnel config file when using port is not 80 or 443. ( our config tcp service port is 11702)

2 1

Having strange issue with newer kernels? 6.8.
by Michael D. Setzer II 18 Apr '24

18 Apr '24

Having issues with stunnel not working with this settings that have work with previous kernels? [guamsmtp] client=yes accept = 127.0.0.1:20466 connect = smtp1.guam.net:465 connect = smtp1.guam.net:465 debug = 7 verifyChain = yes CApath = /etc/ssl/certs checkHost = mail.guam.net OCSPaia = yes But now changing to [guamsmtp] client=yes accept = 127.0.0.1:20466 connect = smtp1.guam.net:465 connect = smtp1.guam.net:465 debug = 7 Seems to work. systemctl status stunnel. stunnel.service - TLS tunnel for network daemons Loaded: loaded (/usr/lib/systemd/system/stunnel.service; enabled; preset: disabled) Drop-In: /usr/lib/systemd/system/service.d └─10-timeout-abort.conf Active: active (running) since Thu 2024-04-18 14:48:15 ChST; 5s ago Process: 15349 ExecStart=/usr/bin/stunnel (code=exited, status=0/SUCCESS) Main PID: 15352 (stunnel) Tasks: 3 (limit: 18938) Memory: 3.6M CPU: 1.618s CGroup: /system.slice/stunnel.service └─15352 /usr/bin/stunnel Apr 18 14:48:14 setzconote.dyndns.org systemd[1]: Starting stunnel.service - TLS tunnel for network daemons... Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: stunnel 5.72 on x86_64-redhat-linux-gnu platform Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: Compiled/running with OpenSSL 3.1.1 30 May 2023 Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: Threading:PTHREAD Sockets:POLL,IPv6,SYSTEMD TLS:ENGINE,> Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: Reading configuration from file /etc/stunnel/stunnel.co> Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: UTF-8 byte order mark not detected Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: FIPS mode disabled Apr 18 14:48:15 setzconote.dyndns.org stunnel[15349]: LOG5[ui]: Configuration successful Apr 18 14:48:15 setzconote.dyndns.org systemd[1]: Started stunnel.service - TLS tunnel for network daemons. Using the longer one gives this after attempting to sent smtp. stunnel.service - TLS tunnel for network daemons Loaded: loaded (/usr/lib/systemd/system/stunnel.service; enabled; preset: disabled) Drop-In: /usr/lib/systemd/system/service.d └─10-timeout-abort.conf Active: active (running) since Thu 2024-04-18 14:57:22 ChST; 1min 15s ago Process: 15616 ExecStart=/usr/bin/stunnel (code=exited, status=0/SUCCESS) Main PID: 15619 (stunnel) Tasks: 3 (limit: 18938) Memory: 4.0M CPU: 1.639s CGroup: /system.slice/stunnel.service └─15619 /usr/bin/stunnel Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG4[3]: CERT: Pre-verification error: unable to get local issuer> Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG4[3]: Rejected by CERT at depth=0: CN=*.guam.net Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG7[3]: TLS alert (write): fatal: unknown CA Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG3[3]: SSL_connect: ssl/statem/statem_clnt.c:1889: error:0A0000> Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG5[3]: Connection closed/reset: 0 byte(s) sent to TLS, 0 byte(s> Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG7[3]: Deallocating application specific data for session conne> Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG7[3]: Remote descriptor (FD=16) closed Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG7[3]: local_rfd/local_wfd reset (FD=3) Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG7[3]: Local descriptor (FD=3) closed Apr 18 14:58:11 setzconote.dyndns.org stunnel[15619]: LOG7[3]: Service [guamsmtp] finished (0 left) lines 1-23/23 (END) Was using the Fedora stunnel the is 5.71, but downloaded the latest 5.72, but seem to get same results. Had some issues with nvidia drives that work fine with 6.7.11 kernels, but fail with the 6.8.x drivers, so not sure if it is linked to that? +------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:[email protected] mailto:[email protected] mailto:[email protected] Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+

1 0

stunnel doesn't allow two client certificates with the same Subject DN?
by Christopher Schultz 16 Apr '24

16 Apr '24

Hello, I was recently rotating a certificate for a service and I went through my usual procedure: 1. Generate a new client key+cert; don't place them into service, yet 2. Distribute the new certificate to all my stunnel servers that need to trust it by placing it at the end of each of my servers' CAFile files 3. Restart all stunnel services 4. Swap the old key+cert for the client with the new key+cert 5. Test that all is well I've found that if the Distinguished Name of both the old and new certificate are the same, stunnel will only trust the one that is mentioned /first/ in the CAFile. For example, if the CAFile contains: -----BEGIN CERTIFICATE----- certificate A Serial Number: 12345678 Subject: C=US, OU=Testing, O=Example.com, CN=test -----BEGIN CERTIFICATE----- -----BEGIN CERTIFICATE----- certificate B Serial Number: 87654321 Subject: C=US, OU=Testing, O=Example.com, CN=test -----BEGIN CERTIFICATE----- Certificate A will be trusted but Certificate B will not be trusted. The error shown in the logs is: CERT: Pre-verification error: self signed certificate Apr 15 21:33:06 mirth-pcc.chadis.com stunnel[23421]: Certificate check failed: depth=0, /C=US/OU=Testing/O=Example.com/CN=test While the certificates are both self-signed, that should not cause an error. Removing the old certificate from the CAFile or moving it to the bottom of the file resolves the problem. (But of course then Certificate A is no longer trusted despite it appearing in the CAFile.) Is this expected behavior? It would be very helpful if stunnel could support two different certificates with the same Subject DN for these kinds of cert-rotation processes. The alternatives are to always use a new DN each time or to add/remove at the same time which makes rolling-back more difficult. Note that everything else about these certificates is different: serial number, fingerprint, generating-key, etc. It's only the Subject DN that is the same. This is stunnel 4.56 on x86_64-koji-linux-gnu platform, on Amazon Linux 2. Thanks! -chris

2 1

HELO handshake problem (?)
by Ducale Ducale 10 Apr '24

10 Apr '24

In a Windows 10 machine I'm using a tool (Netwrix Service Monitor) with a SMTP notification feature that doesn't support authentication, so I'm using Stunnel 5.72 as a local relay for SMTP2GO (smtp2go.com) with this configuration: [smtp2go] client = yes accept = 127.0.0.1:25 connect = mail.smtp2go.com:2525 protocol = smtp protocolAuthentication = plain protocolHost = cloud.mydomain.com protocolUsername = smtp2go(a)mydomain.com protocolPassword = P@ssw0rd debug = 7 I try both PLAIN and LOGIN as authentication mode, with this is error: LOGIN: " ... TLS connected: new session negotiated TLSv1.3 ciphersuite: TLS_AES_256_GCM_SHA384 (256-bit encryption) Peer temporary key: X25519, 253 bits Compression: null, expansion: null -> HELO cloud.mydomain.com <- 250 mail.smtp2go.com Hello cloud.mydomain.com [x.x.x.x] -> AUTH LOGIN <- 503 AUTH command used when not advertised Remote server does not support LOGIN authentication ... " PLAIN: " ... TLS connected: new session negotiated TLSv1.3 ciphersuite: TLS_AES_256_GCM_SHA384 (256-bit encryption) Peer temporary key: X25519, 253 bits Compression: null, expansion: null -> HELO cloud.mydomain.com <- 250 mail.smtp2go.com Hello cloud.mydomain.com [x.x.x.x] -> AUTH PLAIN ******************************************** <- 503 AUTH command used when not advertised PLAIN Authentication Failed Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket Deallocating application specific data for session connect address ... " Can anyone help me solve this problem? Thanks!

3 3

help configuration for socks5 nordvpn requiring authentication
by Alberto P 10 Apr '24

10 Apr '24

Hello, I would like to use stunnel to use a socks5 server requiring user/pass authentication (nordvpn) with different clients that allow for a socks5 proxy but no authentication. Could someone help me with the configuration (linux or windows is good). In detail, I don't know how to provide user/pass to the configuration, and if it is actually feasible. Any help will be very appreciated !

1 1

Stunnel - Silent switch to change the install directory
by Meena Prabhakaran 27 Mar '24

27 Mar '24

Hi Team, We are 3rd party patch provider like PatchMyPC or ManageEngine. We are providing similar services to our customers. For more details, please have a look at Autonomous Patching for Every Third-Party Windows App (adaptiva.com) (https://adaptiva.com/products/autonomous-patch) We are willing to add the latest stable version of Stunnel product to our catalogue. Downloaded https://www.stunnel.org/downloads/stunnel-5.72-win64-installer.exe We are testing this app on Windows 10 64Bit VM. Please help us on below points: 1. Is there any switch/parameter which can be passed along with "stunnel-5.72-win64-installer.exe" for changing the "Install directory" silently? Tried these switches - /D, /DIR, /APPDIR, /INSTALLDIR, /TARGETDIR, /INSTALLLOCATION Thanks & Regards, Meena Prabhakaran Application Packager, Adaptiva M +91 9080759487 meena.prabhakaran(a)adaptiva.com<mailto:[email protected]> www.adaptiva.com<http://www.adaptiva.com/> Data Protection and Privacy: Your privacy is important to us. We are committed to protecting your personal information and handling it responsibly. For more information on how we process and protect your data, please review our Privacy Policy (https://adaptiva.com/privacy) Confidentiality Notice: Information in this email and any attachments is confidential and intended solely for the use of the individual(s) to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of Adaptiva. The recipient should check for the presence of viruses, as Adaptiva accepts no liability for any virus transmitted by this email.

3 3

Received trusted client CA list not found
by allmail 16 Mar '24

16 Mar '24

I see this message in the Stunnel (client) logs during SSL handshake with the server The server requires a client certificate which has been configured in the stunnel configuration. The handshake is working fine but I was wondering what exactly does this line mean. From what I found so far, seems like there is a way for the server to specify which CA's it will accept for the client certificate and it can specify them in the ClientCertificate request that it sends This server doesnt send anything like that, so I am guessing that is the reason for this log line? Can someone please confirm? Btw, I see this line only when using TLSv1.3. When I restrict the client to TLSv1.2, I dont see this line. thanks LOG Peer certificate required TLS state (connect): before SSL initialization Initializing application specific data for session authenticated TLS state (connect): SSLv3/TLS write client hello TLS state (connect): SSLv3/TLS write client hello TLS state (connect): SSLv3/TLS read server hello TLS state (connect): TLSv1.3 read encrypted extensions Received trusted client CA list not found TLS state (connect): SSLv3/TLS read server certificate request

1 0

Windows service won't start. ""The Stunnel TLS wrapper service is marked as an interactive service."
by docfxit＠theoffice.la 12 Mar '24

12 Mar '24

This is my log: [code] stunnel 5.72 on x64-pc-mingw32-gnu platform 2024.03.10 10:19:49 LOG5[main]: Compiled/running with OpenSSL 3.2.1 30 Jan 2024 2024.03.10 10:19:49 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI 2024.03.10 10:19:49 LOG7[main]: errno: (*_errno()) 2024.03.10 10:19:49 LOG6[main]: Initializing inetd mode configuration 2024.03.10 10:19:49 LOG7[main]: Running on Windows 6.2 Windows 10 2024.03.10 10:19:49 LOG5[main]: Reading configuration from file C:\Programs\stunnel\config\stunnel.conf 2024.03.10 10:19:49 LOG5[main]: UTF-8 byte order mark not detected 2024.03.10 10:19:49 LOG5[main]: FIPS mode disabled 2024.03.10 10:19:49 LOG6[main]: Compression disabled 2024.03.10 10:19:49 LOG7[main]: No PRNG seeding was required 2024.03.10 10:19:49 LOG6[main]: Initializing service [pop3_DocfxitGmail] 2024.03.10 10:19:49 LOG7[main]: Initializing context [pop3_DocfxitGmail] 2024.03.10 10:19:49 LOG6[main]: OpenSSL security level is used: 2 2024.03.10 10:19:49 LOG7[main]: Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK 2024.03.10 10:19:49 LOG7[main]: TLSv1.3 ciphersuites: TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256 2024.03.10 10:19:49 LOG7[main]: TLS options: 0x2100000 (+0x0, -0x0) 2024.03.10 10:19:49 LOG6[main]: Session resumption enabled 2024.03.10 10:19:49 LOG7[main]: No certificate or private key specified 2024.03.10 10:19:49 LOG6[main]: No trusted certificates found [/code] I copied a working config from Windows 7 64bit. Running stunnel 5.50

2 1

A conclusive Manual for Web Nursing Classes
by silir10174＠mcuma.com 07 Mar '24

07 Mar '24

[b]A conclusive Manual for Web Nursing Classes[/b] Show (150 words): In the rapidly creating circumstance of preparing, electronic learning has changed into an establishment for overwhelmingly most certain clinical directors searching for flexibility and responsiveness. This wide aide, "Rx for Progress: An unequivocal [url=https://tutorsacademy.co/nurs-fpx-4050-assessment-2-ethical-and-policy-factors-in-care-coordination/]4050 assessment 2[/url] Manual for Electronic Nursing Classes," bounces into the universe of web nursing bearing, offering boundless encounters and strong signs to explore this imperative learning environment. From picking the right program to winning in virtual study corridors, this guide means to empower specific specialists with the data and resources expected to prosper in the online nursing preparing space. I. The Move of Web Nursing Coaching The key piece investigates the making obviousness of electronic nursing programs, uncovering data into the parts that have added to their standing. Look at the flexibility these undertakings offer, the rising interest for remote learning, and such progress in movement that [url=https://tutorsacademy.co/nurs-fpx-4040-assessment-1-nursing-informatics-in-health-care/]nurs 4040 assessment 1[/url] make electronic arranging more open than later in consistent memory. II. Picking the Right Web Nursing Undertaking This part gives an every little push toward turn guide on picking the ideal electronic nursing program. It covers fundamental evaluations like declaration, program reputation, labor force endorsements, and the availability of clinical approaches. Furthermore, it offers tips on researching and standing separated different undertakings from ensure a remarkably arranged fit for individual necessities and goals. III. Investigating Virtual Homerooms Truly analyzing the virtual homeroom is genuine for web nursing students. This part offers significant empowering on utilizing time, as a matter of fact, convincing correspondence with instructors and mates, and utilizing on the web resources. It also addresses typical challenges looked by online students and gives systems to beat them. IV. Controlling Clinical Experiences Clinical experiences are a crucial piece of nursing tutoring. This part examines how web nursing programs coordinate clinical circumstances, orchestrating the meaning of dynamic experience and offering heading on finding fitting entryways locally. It likewise discusses the control of reenactment movement in beating any hindrance among speculation and practice. V. Instruments and Movements for Online Accomplishment To win in electronic nursing classes, students ought to be have a lot of involvement in various contraptions and levels of progress. This part approaches basic programming, stages, and resources that can moreover cultivate the shocking an open door for development. From virtual labs to crafty outline materials, this guide ensures students are outstanding for progress. VI. Vanquishing Challenges and Remaining Invigorated Web learning goes with its own course of action of troubles. This part pays special attention to normal blocks like detachment, time use difficulties, and movement issues. It gives essential clues on extra moved, searching for help, and saving solid areas for an among fun and serious exercises. End Considering everything, "Rx for Progress: A persuading Manual for Electronic Nursing Classes" fills in as a total partner without a doubt clinical managers leaving on their online training experience. By resolving focal issues of view from program decision to overwhelming virtual homerooms, this guide partners with students to thrive in the dynamic and repaying field of electronic nursing training. Outfitted with data and sensible designs, perusers are all set to embrace the doorways and burdens of electronic getting, making game plans for a valuable nursing business.

1 0

Stunnel HA Options
by caspernetherlands＠gmail.com 07 Mar '24

07 Mar '24

Hello folks, I have seen a couple of other posts concerning this question but I am still unclear and wanted to see if there are any new options for 2024. What would the recommended setup for Stunnel look like for HA (high-availability)? All I need is basically to have two servers, one active and another one stand by and be able to fail over to the standby server when the active one becomes unavailable due to hardware failure, bad vmotion etc. Extra point if this setup offers automatic failover to DR as well, meaning failover to a third server that's also on standby in case of catastrophic failures on the first two. This almost looks like a load-balancing solution but not really. I say this because I tried to leverage F5 to accomplish this HA scenario and wasn't successful at it because of the way that the F5 performs active checks so often and how noisy that can be for network perimeter security setups. My main request is the local HA though, I can come up with a solution for DR later on. Any recommendation is appreciated. Thank you in advance!

4 5

possible typo in manpage imap example
by alisonatwork＠outlook.com 05 Mar '24

05 Mar '24

Hi, It's possible that I am missing something obvious, but I was reading the manpage today and it seems like the example suggesting how to configure an email client for tunneled imap is incorrect. It suggests that the user configure their client to connect to port 119, but then the example stunnel config shows accept = 143. If this is indeed incorrect, I think the following files need to be modified to change 119 to 143: doc/stunnel.8.in doc/stunnel.html.in doc/stunnel.pl.8.in doc/stunnel.pl.html.in doc/stunnel.pl.pod.in doc/stunnel.pod.in Regards, Alison

1 0

Succeeding in Nursing Academia: The Critical Impact of Online Course Assistance on Academic Triumph
by towim42830＠artgulin.com 04 Mar '24

04 Mar '24

Introduction: In the dynamic landscape of education, the demand for online courses has witnessed an unprecedented surge, especially in fields like nursing. The flexibility and accessibility offered by online learning platforms have made education more attainable for individuals balancing work, family, and other commitments nurs fpx 4050 assessment 2. However, the rigorous nature of nursing programs can pose challenges for students, leading many to seek assistance with their coursework. In this blog, we will explore the growing trend of students turning to online course help and paying someone to do their online classes, particularly in the realm of nursing paper writing services. The Rise of Online Nursing Education: The allure of online nursing education lies in its flexibility, allowing aspiring nurses to pursue their dreams without sacrificing their current commitments. With the increasing popularity of online nursing programs, students are presented with a unique set of challenges. Balancing clinical experiences, theoretical coursework, and other responsibilities can be overwhelming, prompting students to explore options for additional support. The Need for Academic Assistance: Nursing programs often require students to delve into complex topics, complete extensive research, and submit well-crafted papers. The pressure to excel in both practical and theoretical aspects of nursing education can be daunting, leading some students to seek online course help. The question then arises – is it ethical to pay someone to do my online class or assist with nursing paper writing services? Understanding the Ethical Dilemma: The ethical considerations surrounding seeking academic assistance are complex. On one hand, students argue that external support enables them to focus on practical experiences and hands-on learning. On the other hand, critics argue that outsourcing coursework undermines the integrity of education and the development of essential skills nurs-fpx 4060 assessment 1. Navigating the Online Course Help Landscape: For those considering online course help, it is crucial to approach the situation with caution and a clear understanding of the ethical implications. Many online platforms and services claim to provide assistance with nursing paper writing services, but it is essential to discern between legitimate support and services that may compromise academic integrity. Choosing Reputable Services: When seeking online course help for nursing paper writing services, it is imperative to choose reputable and ethical service providers. These services should prioritize academic honesty, transparency, and the development of students' critical thinking skills. Thoroughly researching and vetting potential service providers can help students make informed decisions. The Role of Academic Support Services: Rather than viewing online course help as a shortcut, students should consider these services as valuable supplements to their learning journey. Academic support services can offer guidance, feedback, and assistance in understanding complex nursing concepts. This collaborative approach allows students to enhance their skills while meeting the demands of their coursework chamberlain nurse executive track. Developing Essential Skills: While online course help can provide support, it is essential for students to actively engage with the material and develop the critical skills necessary for a successful nursing career. Ethical academic support services aim to empower students, encouraging them to take an active role in their education and fostering a sense of responsibility for their learning outcomes. Balancing Priorities: The decision to seek online course help should be accompanied by a realistic assessment of one's priorities and capabilities. Nursing students juggling multiple responsibilities may find that strategic use of academic support services can help them maintain a healthy work-life balance while excelling in their coursework. The Impact on Future Nursing Practice: Aspiring nurses must recognize that the skills and knowledge acquired during their education directly impact their ability to provide quality patient care in the future. While online course help can provide temporary relief, it is crucial for students to actively engage with the material and strive for a deep understanding of nursing concepts. Conclusion: The landscape of nursing education is evolving, with online courses offering unprecedented flexibility for students. As the demand for nursing professionals continues to grow, the need for academic support services, including nursing paper writing services, is likely to persist online class help. However, students must approach online course help with a balanced perspective, understanding the ethical considerations and prioritizing the development of essential skills. By navigating the online course help landscape responsibly, nursing students can enhance their learning experience and prepare for a successful and fulfilling career in healthcare.

1 0

older browsers, stunnel and privoxy
by kovacs janos 04 Mar '24

04 Mar '24

sorry to bother, im trying to make older browsers be able to display TLS 1.1 and TLS 1.2 sites. i heard stunnel cant be configured to always forward to the current site address dynamically, thats why i would use privoxy. the browser is configured to send to: 127.0.0.1 443 stunnel config has this at the end: [Tunnel_in] client = yes accept = 127.0.0.1:443 connect = 127.0.0.1:8118 verifyChain = yes CAfile = ca-certs.pem checkHost = localhost 127.0.0.1:8118 is the privoxy address. this is what stunnel writes: LOG5[main]: Configuration successful LOG5[0]: Service [Tunnel_in] accepted connection from 127.0.0.1:3261 LOG5[0]: s_connect: connected 127.0.0.1:8118 LOG5[0]: Service [Tunnel_in] connected remote server from 127.0.0.1:3262 and the browser infinitely loads, and never loads anything or leaves the page. if i remove the last 3 lines, its the same just with this line added: LOG4[main]: Service [Tunnel_in] needs authentication to prevent MITM attacks but it doesnt give an error or anything. with a configuration like: [Tunnel_out] client = no accept = 127.0.0.1:443 connect = 127.0.0.1:8118 cert = stunnel.pem this is what it gives: LOG5[3]: Service [Tunnel_out] accepted connection from 127.0.0.1:3294 LOG3[3]: SSL_accept: 1407609B: error:1407609B:SSL routines:SSL23_GET_CLIENT_HELLO:https proxy request LOG5[3]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket and browser gives a server not found error immediately. im not even sure if i should use client or server configuration in a case like this, but none of them works anyway. all i would need is for my browser to get the pages decrypted, or at least in less than TLS1.1. like how on newipnow.com i can access sites with any encryption, since they are sent to the browser without encryption. the browser just gives an "unencrypted tunnel" warning, which is how i found stunnel, and which is exactly what i need, just locally.

8 41

How to use best config to secure stunnel?
by sephrrr＠gmail.com 27 Feb '24

27 Feb '24

Irans goverment start to detect stunnel with openvpn tunnel. how to avoid this? is there any updates for stunnel for this problem?

1 0

Windows 2022 tunnel client issues
by Mark Weishaar 23 Feb '24

23 Feb '24

Hello, I’m working on replacing an older Windows server that uses stunnel 5.71 to connect to an Oracle database running on a Linux box. I can communicate just fine with the older Windows machine and another Linux box; however, when I try to connect with the stunnel 5.72 on the Windows 2022 server, I keep running into issues and the connection is forcibly closed. Old Windows server: stunnel 5.71 New Windows 2022 server: stunnel 5.72 (I also tried 5.71 and 5.62 just to rule things out Oracle db server: stunnel 5.72 Other Linux server: stunnel 5.72 My stunnel.conf file is very basic, but this is what is working from my other Windows server (running stunnel 5.71): debug = 7 [oracle15211] client = yes accept = 127.0.0.1:15211 connect = 172.28.125.52:15211 Below is the log with debug level 7… the only issue that I’m seeing is the “transfer() loop executes not transferring any data” message that baffles me but I’m not sure if that’s the cause of my issues or not: 2024.02.23 11:10:21 LOG7[0]: Service [oracle15211] started 2024.02.23 11:10:21 LOG7[0]: Setting local socket options (FD=768) 2024.02.23 11:10:21 LOG7[0]: Option TCP_NODELAY set on local socket 2024.02.23 11:10:21 LOG5[0]: Service [oracle15211] accepted connection from 127.0.0.1:49750 2024.02.23 11:10:21 LOG6[0]: s_connect: connecting 172.28.125.52:15211 2024.02.23 11:10:21 LOG7[0]: s_connect: s_poll_wait 172.28.125.52:15211: waiting 10 seconds 2024.02.23 11:10:21 LOG7[0]: FD=780 ifds=rwx ofds=--- 2024.02.23 11:10:21 LOG5[0]: s_connect: connected 172.28.125.52:15211 2024.02.23 11:10:21 LOG5[0]: Service [oracle15211] connected remote server from 172.28.112.245:49751 2024.02.23 11:10:21 LOG7[0]: Setting remote socket options (FD=780) 2024.02.23 11:10:21 LOG7[0]: Option TCP_NODELAY set on remote socket 2024.02.23 11:10:21 LOG7[0]: Remote descriptor (FD=780) initialized 2024.02.23 11:10:21 LOG6[0]: SNI: sending servername: 172.28.125.52 2024.02.23 11:10:21 LOG6[0]: Peer certificate not required 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): before SSL initialization 2024.02.23 11:10:21 LOG7[0]: Initializing application specific data for session authenticated 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS write client hello 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS write client hello 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS read server hello 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): TLSv1.3 read encrypted extensions 2024.02.23 11:10:21 LOG6[0]: CERT: Certificate verification disabled 2024.02.23 11:10:21 LOG6[0]: CERT: Certificate verification disabled 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS read server certificate 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): TLSv1.3 read server certificate verify 2024.02.23 11:10:21 LOG7[0]: OCSP stapling: Client callback called 2024.02.23 11:10:21 LOG6[0]: OCSP: Certificate chain verification disabled 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS read finished 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS write change cipher spec 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS write finished 2024.02.23 11:10:21 LOG7[0]: 1 client connect(s) requested 2024.02.23 11:10:21 LOG7[0]: 1 client connect(s) succeeded 2024.02.23 11:10:21 LOG7[0]: 0 client renegotiation(s) requested 2024.02.23 11:10:21 LOG7[0]: 0 session reuse(s) 2024.02.23 11:10:21 LOG6[0]: TLS connected: new session negotiated 2024.02.23 11:10:21 LOG6[0]: TLSv1.3 ciphersuite: TLS_AES_256_GCM_SHA384 (256-bit encryption) 2024.02.23 11:10:21 LOG6[0]: Peer temporary key: X25519, 253 bits 2024.02.23 11:10:21 LOG7[0]: Compression: null, expansion: null 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSL negotiation finished successfully 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSL negotiation finished successfully 2024.02.23 11:10:21 LOG7[0]: Initializing application specific data for session authenticated 2024.02.23 11:10:21 LOG7[0]: Deallocating application specific data for session connect address 2024.02.23 11:10:21 LOG7[0]: New session callback 2024.02.23 11:10:21 LOG7[0]: Peer certificate was cached (1375 bytes) 2024.02.23 11:10:21 LOG6[0]: Session id: B36502A30B16F61EFE3A13B7BAA73BBCD57C2C6DB838FFC7CDFDE9BF7D8607A0 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS read server session ticket 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSL negotiation finished successfully 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSL negotiation finished successfully 2024.02.23 11:10:21 LOG7[0]: Initializing application specific data for session authenticated 2024.02.23 11:10:21 LOG7[0]: New session callback 2024.02.23 11:10:21 LOG7[0]: Deallocating application specific data for session connect address 2024.02.23 11:10:21 LOG6[0]: Session id: 7FC6ABDCD70443FE70736F725F90792FAC2692FD9AD8F54A3F0443C2403C9A0C 2024.02.23 11:10:21 LOG7[0]: TLS state (connect): SSLv3/TLS read server session ticket 2024.02.23 11:10:21 LOG3[0]: transfer() loop executes not transferring any data 2024.02.23 11:10:21 LOG3[0]: please report the problem to Michal.Trojnara(a)stunnel.org<mailto:[email protected]> 2024.02.23 11:10:21 LOG3[0]: stunnel 5.72 on x64-pc-mingw32-gnu platform 2024.02.23 11:10:21 LOG3[0]: Compiled/running with OpenSSL 3.2.1 30 Jan 2024 2024.02.23 11:10:21 LOG3[0]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,OCSP,PSK,SNI 2024.02.23 11:10:21 LOG7[0]: errno: (*_errno()) 2024.02.23 11:10:21 LOG3[0]: protocol=TLSv1.3, SSL_pending=0, SSL_has_pending=0 2024.02.23 11:10:21 LOG3[0]: sock_open_rd=Y, sock_open_wr=Y 2024.02.23 11:10:21 LOG3[0]: SSL_RECEIVED_SHUTDOWN=n, SSL_SENT_SHUTDOWN=n 2024.02.23 11:10:21 LOG3[0]: sock_can_rd=n, sock_can_wr=n 2024.02.23 11:10:21 LOG3[0]: ssl_can_rd=n, ssl_can_wr=n 2024.02.23 11:10:21 LOG3[0]: read_wants_read=Y, read_wants_write=n 2024.02.23 11:10:21 LOG3[0]: write_wants_read=n, write_wants_write=n 2024.02.23 11:10:21 LOG3[0]: shutdown_wants_read=n, shutdown_wants_write=n 2024.02.23 11:10:21 LOG3[0]: socket input buffer: 0 byte(s), TLS input buffer: 0 byte(s) 2024.02.23 11:10:21 LOG5[0]: Connection reset: 685 byte(s) sent to TLS, 381 byte(s) sent to socket 2024.02.23 11:10:21 LOG7[0]: remote_fd reset (FD=780) 2024.02.23 11:10:21 LOG7[0]: Remote descriptor (FD=780) closed 2024.02.23 11:10:21 LOG7[0]: local_rfd/local_wfd reset (FD=768) 2024.02.23 11:10:21 LOG7[0]: Local descriptor (FD=768) closed 2024.02.23 11:10:21 LOG7[0]: Service [oracle15211] finished (0 left) Any help is greatly appreciated! Thank you, Mark

1 0

Dynamic DNS
by alstar＠maybenot.work 20 Feb '24

20 Feb '24

Hi, I'm running Stunnel on Linux. It needs to connect to a dynamic IP address (by domain name). The DNS is updated automatically. I noticed that the last time the address changed, Stunnel stopped working. A ping from the machine produced the correct address but Stunnel was using the old one. Will a reload work?

4 6

stunnel 5.72 released
by Michał Trojnara 05 Feb '24

05 Feb '24

Dear Users, I have released version 5.72 of stunnel. ### Version 5.72, 2024.02.04, urgency: MEDIUM * Security bugfixes - OpenSSL DLLs updated to version 3.2.1. * Bugfixes - Fixed SSL_CTX_new() errors handling. - Fixed OPENSSL_NO_PSK builds. - Android build updated for NDK r23c. - stunnel.nsi updated for Debian 12. - Fixed tests with OpenSSL older than 1.0.2. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 3d532941281ae353319735144e4adb9ae489a10b7e309c58a48157f08f42e949 stunnel-5.72.tar.gz 1037c53f8ab590c2f3001e54cf381c3ea4225e9670b03870191383060e6851e7 stunnel-5.72-win64-installer.exe 668161b90034820198c456b4137ed3680d6fd49d4de920d51e499b84538f63d3 stunnel-5.72-android.zip Best regards, Mike

1 0

error:0A00010B:SSL routines::wrong version number
by Graham Lang 18 Dec '23

18 Dec '23

Hi, I've been using Stunnel for many years without a problem but I just changed my email provider and now my mail client can't send emails. Receiving via POP is still fine, but sending via SMTP is giving the error "SSL_connect: ssl/record/ssl3_record.c:354: error:0A00010B:SSL routines::wrong version number" The old SMTP server was on port 465 whereas the new server (hotmail) is on port 587 so that may be the source of the problem. My config file is quite simple: socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 client = yes [pop] accept = 110 connect = outlook.office365.com:995 [smtp] accept = 25 connect = smtp-mail.outlook.com:587 I just changed the POP and SMTP server details to the new ones. POP is still on port 995 as it was before but SMTP has changed from 465 to 587. I was running an older version of Stunnel but updating to latest version hasn't helped. Does anyone have any ideas? I'd hate to have to lose my old Email client which has so many messages stored so it would be great to get it working fully with hotmail. Thanks! Graham.

4 3